<s>
System	B-Operating_System
7	I-Operating_System
,	O
codenamed	O
"	O
Big	O
Bang	O
"	O
,	O
and	O
also	O
known	O
as	O
Mac	B-Operating_System
OS	I-Operating_System
7	I-Operating_System
,	O
is	O
a	O
graphical	O
user	O
interface-based	O
operating	B-General_Concept
system	I-General_Concept
for	O
Macintosh	B-Device
computers	I-Device
and	O
is	O
part	O
of	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
series	O
of	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
It	O
was	O
introduced	O
on	O
May	O
13	O
,	O
1991	O
,	O
by	O
Apple	O
Computer	O
It	O
succeeded	O
System	B-Protocol
6	I-Protocol
,	O
and	O
was	O
the	O
main	O
Macintosh	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
until	O
it	O
was	O
succeeded	O
by	O
Mac	B-Operating_System
OS	I-Operating_System
8	I-Operating_System
in	O
1997	O
.	O
</s>
<s>
Current	O
for	O
more	O
than	O
six	O
years	O
,	O
System	B-Operating_System
7	I-Operating_System
was	O
the	O
longest-lived	O
major	O
version	O
series	O
of	O
the	O
classic	O
Macintosh	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
(	O
to	O
date	O
,	O
only	O
Mac	B-Application
OS	I-Application
X	I-Application
had	O
a	O
longer	O
lifespan	O
)	O
.	O
</s>
<s>
Features	O
added	O
with	O
the	O
System	B-Operating_System
7	I-Operating_System
release	O
included	O
virtual	B-Architecture
memory	I-Architecture
,	O
personal	O
file	O
sharing	O
,	O
QuickTime	B-Application
,	O
QuickDraw	B-Operating_System
3D	I-Operating_System
,	O
and	O
an	O
improved	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
With	O
the	O
release	O
of	O
version	O
7.6	O
in	O
1997	O
,	O
Apple	O
officially	O
renamed	O
the	O
operating	B-General_Concept
system	I-General_Concept
"	O
Mac	B-Application
OS	I-Application
"	O
,	O
a	O
name	O
that	O
had	O
first	O
appeared	O
on	O
System	B-Operating_System
7.5.1	I-Operating_System
'	O
s	O
boot	O
screen	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
was	O
developed	O
for	O
Macs	B-Device
that	O
used	O
the	O
Motorola	B-Device
680x0	I-Device
line	O
of	O
processors	O
,	O
but	O
was	O
ported	O
to	O
the	O
PowerPC	B-Architecture
after	O
Apple	O
adopted	O
the	O
new	O
processor	O
in	O
1994	O
with	O
the	O
introduction	O
of	O
the	O
Power	B-Device
Macintosh	I-Device
.	O
</s>
<s>
The	O
development	O
of	O
the	O
Macintosh	B-Application
system	I-Application
software	I-Application
up	O
to	O
System	B-Protocol
6	I-Protocol
followed	O
a	O
fairly	O
smooth	O
progression	O
with	O
the	O
addition	O
of	O
new	O
features	O
and	O
relatively	O
small	O
changes	O
and	O
upgrades	O
over	O
time	O
.	O
</s>
<s>
Some	O
perspective	O
on	O
the	O
scope	O
of	O
the	O
changes	O
can	O
be	O
seen	O
by	O
examining	O
the	O
official	O
system	O
documentation	O
,	O
Inside	B-Operating_System
Macintosh	I-Operating_System
.	O
</s>
<s>
This	O
initially	O
shipped	O
in	O
three	O
volumes	O
,	O
adding	O
another	O
to	O
describe	O
the	O
changes	O
introduced	O
with	O
the	O
Mac	B-Device
Plus	I-Device
,	O
and	O
another	O
for	O
the	O
Mac	B-Device
II	I-Device
and	O
Mac	B-Device
SE	I-Device
.	O
</s>
<s>
These	O
limited	O
changes	O
meant	O
that	O
the	O
original	O
Macintosh	B-Application
system	I-Application
remained	O
largely	O
as	O
it	O
was	O
when	O
initially	O
introduced	O
.	O
</s>
<s>
That	O
is	O
,	O
the	O
machine	O
was	O
geared	O
towards	O
a	O
single	O
user	O
and	O
task	O
running	O
on	O
a	O
floppy	B-Device
disk	I-Device
based	O
machine	O
of	O
extremely	O
limited	O
RAM	B-Architecture
.	O
</s>
<s>
Running	O
MultiFinder	O
normally	O
required	O
a	O
larger	O
amount	O
of	O
RAM	B-Architecture
and	O
a	O
hard	B-Device
drive	I-Device
,	O
but	O
these	O
became	O
more	O
common	O
by	O
the	O
late	O
1980s	O
.	O
</s>
<s>
For	O
instance	O
,	O
to	O
support	O
a	O
limited	O
form	O
of	O
multitasking	O
,	O
the	O
original	O
Mac	B-Application
OS	I-Application
supported	O
small	O
co-resident	O
programs	O
known	O
as	O
desk	B-Application
accessories	I-Application
,	O
which	O
had	O
to	O
be	O
installed	O
into	O
the	O
system	O
using	O
special	O
tools	O
.	O
</s>
<s>
If	O
the	O
system	O
were	O
able	O
to	O
support	O
multiple	O
tasks	O
,	O
this	O
one-off	O
solution	O
would	O
no	O
longer	O
be	O
needed	O
—	O
desk	B-Application
accessories	I-Application
could	O
simply	O
be	O
small	O
programs	O
,	O
placed	O
anywhere	O
.	O
</s>
<s>
Finally	O
,	O
the	O
widespread	O
adoption	O
of	O
hard	B-Device
drives	I-Device
and	O
local	B-General_Concept
area	I-General_Concept
networks	I-General_Concept
led	O
to	O
any	O
number	O
of	O
new	O
features	O
being	O
requested	O
from	O
users	O
and	O
developers	O
.	O
</s>
<s>
In	O
March	O
1988	O
,	O
shortly	O
before	O
the	O
release	O
of	O
System	B-Protocol
6	I-Protocol
,	O
technical	O
middle	O
managers	O
at	O
Apple	O
held	O
an	O
offsite	O
meeting	O
to	O
plan	O
the	O
future	O
course	O
of	O
Mac	B-Application
OS	I-Application
development	O
.	O
</s>
<s>
Ideas	O
were	O
written	O
on	O
index	O
cards	O
;	O
features	O
that	O
seemed	O
simple	O
enough	O
to	O
implement	O
in	O
the	O
short	O
term	O
(	O
like	O
adding	O
color	O
to	O
the	O
user	B-Application
interface	I-Application
)	O
were	O
written	O
on	O
blue	O
cards	O
,	O
longer-term	O
goals	O
like	O
true	O
multitasking	O
on	O
pink	O
cards	O
,	O
and	O
"	O
far	O
out	O
"	O
ideas	O
like	O
an	O
object-oriented	B-Language
file	B-Application
system	I-Application
on	O
red	O
cards	O
.	O
</s>
<s>
Development	O
of	O
the	O
ideas	O
contained	O
on	O
the	O
blue	O
and	O
pink	O
cards	O
was	O
to	O
proceed	O
in	O
parallel	O
,	O
and	O
at	O
first	O
the	O
two	O
projects	O
were	O
known	O
simply	O
as	O
"	O
blue	O
"	O
and	O
"	O
pink	O
"	O
(	O
including	O
Taligent	B-Operating_System
)	O
.	O
</s>
<s>
Apple	O
intended	O
to	O
have	O
the	O
"	O
blue	O
"	O
team	O
(	O
which	O
came	O
to	O
call	O
themselves	O
the	O
"	O
Blue	O
Meanies	O
"	O
after	O
characters	O
in	O
Yellow	O
Submarine	O
)	O
release	O
an	O
updated	O
version	O
of	O
the	O
existing	O
Macintosh	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
in	O
the	O
1990	O
–	O
1991	O
time-frame	O
,	O
and	O
the	O
"	O
pink	O
"	O
team	O
to	O
release	O
an	O
entirely	O
new	O
OS	O
around	O
1993	O
.	O
</s>
<s>
As	O
Blue	O
was	O
aimed	O
at	O
relatively	O
"	O
simple	O
"	O
upgrades	O
,	O
the	O
feature	O
list	O
reads	O
to	O
some	O
degree	O
as	O
a	O
sort	O
of	O
"	O
System	B-Protocol
6	I-Protocol
,	O
corrected	O
"	O
.	O
</s>
<s>
32-bit	O
QuickDraw	B-Operating_System
,	O
supporting	O
so-called	O
"	O
true	O
color	O
"	O
imaging	O
,	O
was	O
included	O
as	O
standard	O
;	O
it	O
was	O
previously	O
available	O
as	O
a	O
system	B-Operating_System
extension	I-Operating_System
.	O
</s>
<s>
A	O
new	O
Sound	O
Manager	O
API	B-Application
,	O
version	O
2.0	O
,	O
replaced	O
the	O
older	O
ad	O
hoc	O
APIs	B-Application
.	O
</s>
<s>
The	O
new	O
APIs	B-Application
featured	O
significantly	O
improved	O
hardware	B-Operating_System
abstraction	I-Operating_System
,	O
as	O
well	O
as	O
higher-quality	O
playback	O
.	O
</s>
<s>
Although	O
technically	O
not	O
a	O
new	O
feature	O
for	O
System	B-Operating_System
7	I-Operating_System
(	O
as	O
these	O
features	O
were	O
available	O
for	O
System	O
6.0.7	O
)	O
,	O
Sound	O
Manager	O
2.0	O
was	O
the	O
first	O
widespread	O
implementation	O
of	O
this	O
technology	O
to	O
make	O
it	O
to	O
most	O
Mac	B-Device
users	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
paved	O
the	O
way	O
for	O
a	O
full	O
32-bit	O
address	O
space	O
,	O
from	O
the	O
previous	O
24-bit	O
address	O
space	O
.	O
</s>
<s>
While	O
System	B-Operating_System
7	I-Operating_System
itself	O
was	O
32-bit	O
clean	O
,	O
many	O
existing	O
machines	O
and	O
thousands	O
of	O
applications	O
were	O
not	O
,	O
so	O
it	O
was	O
some	O
time	O
before	O
the	O
process	O
was	O
completed	O
.	O
</s>
<s>
To	O
ease	O
the	O
transition	O
,	O
the	O
"	O
Memory	O
"	O
control	B-Operating_System
panel	I-Operating_System
contained	O
a	O
switch	O
to	O
disable	O
this	O
feature	O
,	O
allowing	O
for	O
compatibility	O
with	O
older	O
applications	O
but	O
rendering	O
any	O
installed	O
RAM	B-Architecture
over	O
8	O
MB	O
unusable	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
made	O
MultiFinder	O
's	O
cooperative	B-Operating_System
multitasking	I-Operating_System
mandatory	O
.	O
</s>
<s>
"	O
System	O
extensions	O
"	O
(	O
small	O
pieces	O
of	O
INIT	B-Operating_System
code	O
that	O
extended	O
the	O
system	O
's	O
functionality	O
)	O
were	O
relocated	O
to	O
their	O
own	O
subfolder	O
(	O
rather	O
than	O
in	O
the	O
root	O
level	O
of	O
the	O
System	B-Operating_System
Folder	I-Operating_System
itself	O
as	O
on	O
earlier	O
versions	O
)	O
and	O
they	O
could	O
be	O
installed	O
or	O
removed	O
at	O
the	O
user	O
's	O
will	O
simply	O
by	O
moving	O
these	O
"	O
extensions	O
"	O
to	O
or	O
from	O
the	O
folder	O
and	O
then	O
rebooting	O
the	O
computer	O
.	O
</s>
<s>
There	O
was	O
an	O
auto-routing	O
feature	O
for	O
extensions	O
,	O
control	B-Operating_System
panels	I-Operating_System
,	O
fonts	O
and	O
Desk	B-Application
Accessories	I-Application
where	O
they	O
could	O
simply	O
be	O
dropped	O
onto	O
the	O
System	B-Operating_System
folder	I-Operating_System
.	O
</s>
<s>
Later	O
versions	O
of	O
System	B-Operating_System
7	I-Operating_System
offered	O
a	O
feature	O
called	O
"	O
Extensions	B-Operating_System
Manager	I-Operating_System
"	O
,	O
which	O
simplified	O
the	O
process	O
of	O
enabling/disabling	O
individual	O
extensions	O
.	O
</s>
<s>
Similarly	O
,	O
the	O
Control	B-Operating_System
Panel	I-Operating_System
desk	B-Application
accessory	I-Application
became	O
the	O
Control	B-Operating_System
Panels	I-Operating_System
folder	O
(	O
found	O
in	O
the	O
System	B-Operating_System
Folder	I-Operating_System
,	O
and	O
accessible	O
to	O
the	O
user	O
from	O
an	O
alias	B-Application
in	O
the	O
Apple	O
menu	O
)	O
.	O
</s>
<s>
The	O
control	B-Operating_System
panels	I-Operating_System
themselves	O
became	O
separate	O
files	O
,	O
stored	O
within	O
this	O
directory	O
.	O
</s>
<s>
Control	B-Operating_System
panels	I-Operating_System
are	O
essentially	O
system	O
extensions	O
with	O
a	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
The	O
Apple	O
menu	O
(	O
previously	O
home	O
only	O
to	O
desk	B-Application
accessories	I-Application
pulled	O
from	O
"	O
DRVR	O
"	O
resources	O
in	O
the	O
System	B-Application
file	I-Application
)	O
now	O
listed	O
the	O
contents	O
of	O
a	O
folder	O
(	O
"	O
Apple	O
Menu	O
Items	O
"	O
)	O
,	O
including	O
aliases	O
(	O
see	O
below	O
)	O
.	O
</s>
<s>
Desk	B-Application
accessories	I-Application
had	O
originally	O
been	O
intended	O
to	O
provide	O
a	O
form	O
of	O
multitasking	O
and	O
were	O
no	O
longer	O
necessary	O
now	O
that	O
real	O
multitasking	O
was	O
always	O
enabled	O
.	O
</s>
<s>
The	O
desk-accessory	O
technology	O
was	O
deprecated	O
,	O
with	O
System	B-Operating_System
7	I-Operating_System
treating	O
them	O
largely	O
the	O
same	O
as	O
other	O
applications	O
.	O
</s>
<s>
Desk	B-Application
accessories	I-Application
now	O
ran	O
in	O
their	O
own	O
process	O
rather	O
than	O
borrowing	O
that	O
of	O
a	O
host	O
application	B-Application
.	O
</s>
<s>
Under	O
System	B-Protocol
6	I-Protocol
,	O
the	O
Apple	O
Menu	O
contained	O
both	O
a	O
list	O
of	O
desk	B-Application
accessories	I-Application
and	O
a	O
list	O
of	O
running	O
programs	O
under	O
MultiFinder	O
.	O
</s>
<s>
In	O
System	B-Operating_System
7	I-Operating_System
the	O
list	O
of	O
active	O
programs	O
was	O
relocated	O
to	O
its	O
own	O
Application	B-Application
Menu	O
.	O
</s>
<s>
Along	O
with	O
various	O
UI	B-Application
improvements	O
for	O
AppleTalk	B-Application
setup	O
,	O
System	B-Operating_System
7	I-Operating_System
also	O
included	O
a	O
basic	O
file	O
sharing	O
server	O
allowing	O
any	O
machine	O
to	O
publish	O
folders	O
to	O
the	O
AppleTalk	B-Application
network	O
.	O
</s>
<s>
An	O
alias	B-Application
is	O
a	O
small	O
file	O
that	O
represents	O
another	O
object	O
in	O
the	O
file	B-Application
system	I-Application
.	O
</s>
<s>
A	O
typical	O
alias	B-Application
is	O
small	O
,	O
between	O
1	O
and	O
5KB	O
.	O
</s>
<s>
Similar	O
in	O
concept	O
to	O
Unix	B-Application
symbolic	B-Application
links	I-Application
and	O
Windows	O
shortcuts	O
,	O
an	O
alias	B-Application
acts	O
as	O
a	O
redirect	B-Device
to	O
any	O
object	O
in	O
the	O
file	B-Application
system	I-Application
,	O
such	O
as	O
a	O
document	O
,	O
an	O
application	B-Application
,	O
a	O
folder	O
,	O
a	O
hard	B-Device
disk	I-Device
,	O
a	O
network	B-General_Concept
share	I-General_Concept
or	O
removable	O
medium	O
or	O
a	O
printer	O
.	O
</s>
<s>
Likewise	O
,	O
choosing	O
an	O
alias	B-Application
file	O
from	O
within	O
an	O
"	O
Open	O
"	O
dialog	O
box	O
would	O
open	O
the	O
original	O
file	O
.	O
</s>
<s>
(	O
Unlike	O
the	O
path-based	O
approach	O
of	O
shortcuts	O
and	O
symbolic	B-Application
links	I-Application
,	O
aliases	O
also	O
store	O
a	O
reference	O
to	O
the	O
file	O
's	O
catalog	O
entry	O
,	O
so	O
they	O
continue	O
to	O
work	O
even	O
if	O
the	O
file	O
is	O
moved	O
or	O
renamed	O
.	O
</s>
<s>
Aliases	O
have	O
features	O
of	O
both	O
hard	B-Application
links	I-Application
and	O
symbolic	B-Application
links	I-Application
found	O
on	O
Unix-based	O
systems	O
.	O
</s>
<s>
All	O
three	O
are	O
supported	O
on	O
macOS	B-Application
.	O
)	O
</s>
<s>
Document	O
icons	O
could	O
be	O
dragged	O
with	O
the	O
mouse	O
and	O
"	O
dropped	O
"	O
onto	O
application	B-Application
icons	O
to	O
open	O
in	O
the	O
targeted	O
application	B-Application
.	O
</s>
<s>
Under	O
System	B-Protocol
6	I-Protocol
,	O
one	O
either	O
double-clicked	O
on	O
a	O
document	O
icon	O
to	O
open	O
its	O
associated	O
application	B-Application
,	O
or	O
one	O
could	O
open	O
the	O
desired	O
application	B-Application
and	O
use	O
its	O
Open	O
dialog	O
box	O
.	O
</s>
<s>
The	O
development	O
of	O
the	O
drag-and-drop	O
paradigm	O
led	O
to	O
a	O
new	O
concept	O
for	O
some	O
applications	O
—	O
such	O
as	O
StuffIt	B-Operating_System
Expander	I-Operating_System
—	O
whose	O
main	O
interactions	O
were	O
intended	O
to	O
be	O
via	O
drag	O
and	O
drop	O
.	O
</s>
<s>
"	O
Stationery-aware	O
"	O
applications	O
would	O
create	O
a	O
new	O
,	O
untitled	O
file	O
containing	O
the	O
template	O
data	O
,	O
while	O
non-aware	O
applications	O
would	O
immediately	O
show	O
a	O
Save	B-Application
As	I-Application
dialog	O
box	O
asking	O
the	O
user	O
for	O
the	O
file	O
's	O
name	O
.	O
</s>
<s>
Balloon	B-Protocol
Help	I-Protocol
,	O
a	O
widget-identification	O
system	O
similar	O
to	O
tooltips	O
.	O
</s>
<s>
AppleScript	B-Application
,	O
a	O
scripting	B-Language
language	I-Language
for	O
automating	O
tasks	O
.	O
</s>
<s>
While	O
fairly	O
complex	O
for	O
application	B-Application
programmers	O
to	O
implement	O
support	O
for	O
,	O
this	O
feature	O
was	O
powerful	O
and	O
popular	O
with	O
users	O
,	O
and	O
it	O
remains	O
supported	O
as	O
part	O
of	O
macOS	B-Application
.	O
</s>
<s>
AppleEvents	B-Operating_System
.	O
</s>
<s>
Supporting	O
AppleScript	B-Application
was	O
a	O
new	O
interprocess	B-Operating_System
communication	I-Operating_System
model	O
for	O
"	O
high-level	O
"	O
events	O
to	O
be	O
sent	O
into	O
applications	O
,	O
along	O
with	O
support	O
to	O
allow	O
this	O
to	O
take	O
place	O
over	O
an	O
AppleTalk	B-Application
network	O
.	O
</s>
<s>
Publish	B-Operating_System
and	I-Operating_System
Subscribe	I-Operating_System
.	O
</s>
<s>
This	O
feature	O
permitted	O
data	O
"	O
published	O
"	O
by	O
one	O
application	B-Application
to	O
be	O
imported	O
(	O
"	O
subscribed	O
to	O
"	O
)	O
by	O
another	O
,	O
and	O
the	O
data	O
could	O
be	O
updated	O
dynamically	O
.	O
</s>
<s>
Programmers	O
complained	O
that	O
the	O
API	B-Application
was	O
unwieldy	O
,	O
and	O
relatively	O
few	O
applications	O
ended	O
up	O
adopting	O
it	O
.	O
</s>
<s>
Up	O
to	O
this	O
point	O
,	O
all	O
fonts	O
on	O
the	O
Macintosh	B-Device
were	O
bitmapped	O
,	O
or	O
a	O
set	O
of	O
bitmapped	O
screen	O
fonts	O
paired	O
with	O
outline	O
PostScript	B-Language
printer	O
fonts	O
;	O
TrueType	O
for	O
the	O
first	O
time	O
offered	O
a	O
single	O
font	O
format	O
that	O
scaled	O
to	O
any	O
size	O
on	O
screen	O
and	O
on	O
paper	O
.	O
</s>
<s>
This	O
technology	O
was	O
recognized	O
as	O
being	O
so	O
important	O
that	O
a	O
TrueType	O
extension	O
for	O
System	B-Protocol
6	I-Protocol
was	O
also	O
released	O
,	O
along	O
with	O
an	O
updated	O
Font/DA	B-Application
Mover	I-Application
capable	O
of	O
installing	O
these	O
new	O
kinds	O
of	O
fonts	O
into	O
the	O
System	B-Protocol
6	I-Protocol
System	B-Application
file	I-Application
.	O
</s>
<s>
A	O
newly	O
colorized	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
System	O
7.1	O
marked	O
the	O
advent	O
of	O
System	O
Enablers	O
,	O
small	O
extensions	O
that	O
were	O
loaded	O
at	O
startup	O
to	O
support	O
Macintosh	B-Device
models	O
introduced	O
since	O
the	O
last	O
OS	O
revision	O
.	O
</s>
<s>
Under	O
System	B-Protocol
6	I-Protocol
,	O
Apple	O
had	O
to	O
introduce	O
a	O
number	O
of	O
minor	O
revisions	O
to	O
the	O
OS	O
solely	O
for	O
use	O
with	O
new	O
hardware	O
.	O
</s>
<s>
Apple	O
introduced	O
an	O
unprecedented	O
number	O
of	O
new	O
Macintosh	B-Device
models	O
during	O
the	O
System	B-Operating_System
7	I-Operating_System
era	O
,	O
leading	O
to	O
some	O
confusion	O
over	O
which	O
System	O
Enabler	O
went	O
with	O
which	O
computer(s )	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
was	O
the	O
first	O
Apple	O
operating	B-General_Concept
system	I-General_Concept
to	O
be	O
available	O
on	O
compact	O
disc	O
,	O
although	O
it	O
shipped	O
on	O
a	O
set	O
of	O
15	O
floppy	B-Device
disks	I-Device
initially	O
.	O
</s>
<s>
Unlike	O
earlier	O
systems	O
,	O
System	B-Operating_System
7	I-Operating_System
did	O
not	O
come	O
bundled	O
with	O
major	O
software	O
packages	O
.	O
</s>
<s>
Newly	O
purchased	O
Macintosh	B-Device
computers	I-Device
had	O
System	B-Operating_System
7	I-Operating_System
installed	O
and	O
were	O
often	O
bundled	O
with	O
software	O
such	O
as	O
HyperCard	B-Application
,	O
At	B-Operating_System
Ease	I-Operating_System
and	O
Mouse	B-Operating_System
Practice	I-Operating_System
.	O
</s>
<s>
Later	O
,	O
the	O
Macintosh	B-Device
Performa	I-Device
family	O
added	O
various	O
software	O
bundles	O
including	O
ClarisWorks	B-Device
,	O
The	O
New	O
Grolier	O
Multimedia	O
Encyclopedia	O
,	O
Microsoft	B-Application
Bookshelf	I-Application
,	O
Spectre	O
VR	O
and	O
Power	B-Operating_System
Pete	I-Operating_System
.	O
</s>
<s>
Since	O
System	B-Operating_System
7	I-Operating_System
was	O
introduced	O
before	O
the	O
Internet	O
came	O
to	O
popular	O
attention	O
,	O
software	O
such	O
as	O
MacTCP	B-Operating_System
,	O
FreePPP	B-Operating_System
and	O
Netscape	B-Protocol
were	O
not	O
included	O
at	O
first	O
,	O
but	O
was	O
later	O
available	O
on	O
disk	O
from	O
Internet	O
service	O
providers	O
and	O
bundled	O
with	O
books	O
such	O
as	O
Adam	O
C	O
.	O
Engst	O
's	O
.	O
</s>
<s>
Power	B-Device
Macintosh	I-Device
machines	O
also	O
included	O
NuCalc	B-Application
,	O
a	O
graphing	B-Application
calculator	I-Application
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
also	O
includes	O
AppleTalk	B-Application
networking	O
and	O
file	O
sharing	O
software	O
in	O
the	O
form	O
of	O
system	O
extensions	O
and	O
control	B-Operating_System
panels	I-Operating_System
.	O
</s>
<s>
The	O
basic	O
utilities	O
installed	O
by	O
default	O
with	O
System	B-Operating_System
7	I-Operating_System
include	O
TeachText	B-Operating_System
(	O
which	O
was	O
replaced	O
by	O
SimpleText	B-Operating_System
in	O
later	O
versions	O
)	O
for	O
basic	O
text	O
editing	O
tasks	O
and	O
reading	O
readme	O
documents	O
.	O
</s>
<s>
Also	O
available	O
on	O
the	O
additional	O
"	O
Disk	O
Tools	O
"	O
floppy	B-Device
disk	I-Device
are	O
Disk	B-Operating_System
First	I-Operating_System
Aid	I-Operating_System
for	O
disk	O
repair	O
and	O
Apple	B-Operating_System
HD	I-Operating_System
SC	I-Operating_System
Setup	I-Operating_System
for	O
initializing	O
and	O
partitioning	O
disks	O
.	O
</s>
<s>
Later	O
versions	O
of	O
System	B-Operating_System
7	I-Operating_System
,	O
specifically	O
System	O
7.5	O
and	O
Mac	O
OS	O
7.6	O
,	O
come	O
with	O
dedicated	O
"	O
Utilities	O
"	O
and	O
"	O
Apple	O
Extras	O
"	O
folders	O
including	O
:	O
AppleScript	B-Application
,	O
Disk	B-Operating_System
Copy	I-Operating_System
,	O
QuickDraw	B-Operating_System
GX	I-Operating_System
Extras	O
and	O
QuickTime	B-Application
Movie	O
Player	O
.	O
</s>
<s>
System	B-Operating_System
7.1.2	I-Operating_System
is	O
the	O
first	O
version	O
of	O
the	O
Macintosh	B-Application
System	I-Application
Software	I-Application
to	O
support	O
Apple	O
's	O
new	O
PowerPC-based	O
computers	O
.	O
</s>
<s>
68k	B-Device
applications	O
that	O
had	O
not	O
yet	O
been	O
updated	O
to	O
run	O
natively	O
on	O
these	O
systems	O
were	O
emulated	B-Application
transparently	O
(	O
without	O
the	O
user	O
having	O
to	O
intervene	O
)	O
by	O
a	O
built-in	O
68k	B-Device
processor	I-Device
emulator	I-Device
.	O
</s>
<s>
Fat	B-Application
binaries	O
,	O
which	O
contained	O
the	O
code	O
necessary	O
to	O
run	O
natively	O
on	O
both	O
PowerPC	B-Architecture
and	O
68k	B-Device
systems	O
,	O
became	O
common	O
during	O
this	O
time	O
.	O
</s>
<s>
This	O
process	O
was	O
similar	O
to	O
the	O
distribution	O
of	O
universal	B-Operating_System
binaries	I-Operating_System
during	O
the	O
Mac	B-Device
transition	I-Device
to	I-Device
Intel	I-Device
processors	I-Device
in	O
2006	O
,	O
as	O
well	O
as	O
the	O
Mac	B-Device
transition	I-Device
to	I-Device
Apple	I-Device
silicon	I-Device
beginning	O
in	O
2020	O
.	O
</s>
<s>
System	B-Operating_System
7.1.2	I-Operating_System
is	O
the	O
only	O
release	O
of	O
the	O
Macintosh	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
that	O
boots	O
stating	O
"	O
Welcome	O
to	O
Power	O
Macintosh.	O
"	O
</s>
<s>
This	O
despite	O
the	O
OS	O
being	O
designed	O
to	O
run	O
on	O
68k	B-Device
Macintoshes	B-Device
that	O
were	O
upgraded	O
to	O
PowerPC	B-Architecture
,	O
but	O
without	O
Power	B-Device
Macintosh	I-Device
branding	O
.	O
</s>
<s>
Subsequent	O
System	B-Operating_System
7	I-Operating_System
release	O
7.1.2P	O
reverted	O
this	O
.	O
</s>
<s>
System	O
7.0	O
and	O
7.1	O
offered	O
a	O
utility	O
called	O
Apple	B-Application
File	I-Application
Exchange	I-Application
,	O
which	O
could	O
access	O
the	O
contents	O
of	O
FAT	B-Application
-	O
and	O
Apple	O
II-formatted	O
floppy	B-Device
disks	I-Device
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
Pro	O
,	O
System	O
7.5	O
and	O
up	O
shipped	O
with	O
PC	B-Operating_System
Exchange	I-Operating_System
,	O
previously	O
a	O
separate	O
product	O
,	O
which	O
allowed	O
the	O
system	O
to	O
mount	O
FAT-formatted	O
floppy	B-Device
disks	I-Device
on	O
the	O
desktop	O
in	O
the	O
same	O
manner	O
as	O
regular	O
Macintosh	B-Device
disks	O
.	O
</s>
<s>
OS/2	B-Application
disks	O
were	O
read	O
as	O
PCDOS	O
disks	O
,	O
due	O
to	O
fact	O
that	O
OS/2	B-Application
used	O
the	O
FAT	B-Application
file	I-Application
system	I-Application
.	O
</s>
<s>
At	O
this	O
time	O
,	O
Macs	B-Device
could	O
also	O
read	O
and	O
write	O
UNIX	B-Application
file	B-Application
systems	I-Application
with	O
the	O
help	O
of	O
extra	O
software	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
allowed	O
users	O
to	O
access	O
PC	O
networks	O
and	O
allowed	O
communication	O
via	O
TCP/IP	O
and	O
other	O
compatible	O
networking	O
stacks	O
.	O
</s>
<s>
Actual	O
PC	O
software	O
compatibility	O
,	O
however	O
,	O
required	O
third-party	O
software	O
such	O
as	O
SoftPC	O
,	O
which	O
allowed	O
some	O
MS-DOS	O
and	O
early	O
Microsoft	O
Windows	O
programs	O
to	O
run	O
,	O
or	O
Connectix	B-Application
Virtual	I-Application
PC	I-Application
,	O
which	O
allowed	O
the	O
Mac	B-Device
to	O
run	O
Windows	O
via	O
full	O
PC	O
emulation	B-Application
.	O
</s>
<s>
Apple	O
offered	O
some	O
systems	O
configured	O
this	O
way	O
,	O
marketed	O
as	O
"	O
DOS	O
Compatible	O
"	O
—	O
a	O
card	O
with	O
dedicated	O
x86	O
CPU	O
and	O
RAM	B-Architecture
was	O
used	O
,	O
while	O
the	O
Mac	B-Device
hard	B-Device
drive	I-Device
,	O
sound	O
subsystem	O
,	O
networking	O
and	O
input	O
provided	O
services	O
to	O
the	O
PC	O
.	O
</s>
<s>
The	O
PC	O
could	O
run	O
simultaneously	O
with	O
the	O
Mac	B-Device
,	O
and	O
the	O
user	O
could	O
switch	O
between	O
the	O
two	O
in	O
a	O
fashion	O
similar	O
to	O
a	O
KVM	B-Device
switch	I-Device
.	O
</s>
<s>
The	O
earliest	O
of	O
these	O
systems	O
were	O
680x0	B-Device
based	O
systems	O
running	O
System	B-Operating_System
7	I-Operating_System
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
provided	O
the	O
support	O
for	O
accessing	O
the	O
PC	O
volume	O
from	O
the	O
Mac	B-Device
through	O
its	O
own	O
PC	B-Operating_System
Exchange	I-Operating_System
software	O
,	O
and	O
actual	O
control	O
of	O
the	O
PC	O
hardware	O
was	O
accomplished	O
by	O
way	O
of	O
control	B-Operating_System
panels	I-Operating_System
.	O
</s>
<s>
At	O
the	O
time	O
of	O
its	O
release	O
,	O
many	O
users	O
noticed	O
that	O
performance	O
suffered	O
as	O
a	O
result	O
of	O
upgrading	O
from	O
System	B-Protocol
6	I-Protocol
to	O
System	B-Operating_System
7	I-Operating_System
,	O
though	O
newer	O
hardware	O
soon	O
made	O
up	O
for	O
the	O
speed	O
difference	O
.	O
</s>
<s>
Another	O
problem	O
was	O
System	B-Operating_System
7	I-Operating_System
's	O
large	O
"	O
memory	O
footprint	O
"	O
:	O
System	B-Protocol
6	I-Protocol
could	O
boot	O
the	O
system	O
from	O
a	O
single	O
800k	O
floppy	B-Device
disk	I-Device
and	O
took	O
up	O
about	O
of	O
RAM	B-Architecture
,	O
whereas	O
System	B-Operating_System
7	I-Operating_System
used	O
well	O
over	O
a	O
megabyte	O
.	O
</s>
<s>
It	O
was	O
some	O
time	O
before	O
the	O
average	O
Mac	B-Device
shipped	O
with	O
enough	O
RAM	B-Architecture
built	O
in	O
for	O
System	B-Operating_System
7	I-Operating_System
to	O
be	O
truly	O
comfortable	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
was	O
the	O
first	O
system	O
release	O
that	O
could	O
no	O
longer	O
be	O
usefully	O
run	O
on	O
floppy-only	O
systems	O
.	O
</s>
<s>
Although	O
most	O
Macintosh	B-Device
models	O
sold	O
at	O
the	O
time	O
included	O
a	O
hard	B-Device
disk	I-Device
as	O
standard	O
equipment	O
,	O
owners	O
of	O
older	O
models	O
were	O
required	O
to	O
upgrade	O
their	O
hardware	O
by	O
buying	O
either	O
a	O
new	O
Mac	B-Device
or	O
an	O
external	O
SCSI	B-Architecture
hard	B-Device
disk	I-Device
drive	I-Device
if	O
they	O
wished	O
to	O
run	O
System	B-Operating_System
7	I-Operating_System
.	O
</s>
<s>
In	O
order	O
to	O
take	O
advantage	O
of	O
System	B-Operating_System
7	I-Operating_System
's	O
virtual	B-Architecture
memory	I-Architecture
feature	O
,	O
a	O
Macintosh	B-Device
equipped	O
with	O
a	O
paged	B-General_Concept
memory	I-General_Concept
management	I-General_Concept
unit	I-General_Concept
(	O
PMMU	B-General_Concept
)	O
is	O
required	O
.	O
</s>
<s>
The	O
Motorola	O
68030	O
CPU	O
has	O
one	O
built-in	O
,	O
and	O
one	O
can	O
be	O
added	O
to	O
the	O
motherboard	O
of	O
the	O
Motorola	O
68020-equipped	O
Macintosh	B-Device
II	I-Device
.	O
</s>
<s>
The	O
other	O
Macintosh	B-Device
model	O
using	O
an	O
68020	O
,	O
the	O
Macintosh	B-Device
LC	I-Device
,	O
cannot	O
use	O
virtual	B-Architecture
memory	I-Architecture
.	O
</s>
<s>
Apple	O
introduced	O
the	O
68030-equipped	O
Macintosh	B-Device
LC	I-Device
II	I-Device
shortly	O
after	O
System	B-Operating_System
7	I-Operating_System
's	O
introduction	O
.	O
</s>
<s>
Despite	O
these	O
setbacks	O
,	O
System	O
7.0	O
was	O
adopted	O
quite	O
rapidly	O
by	O
Mac	B-Device
users	O
,	O
and	O
quickly	O
became	O
one	O
of	O
the	O
base	O
requirements	O
for	O
new	O
software	O
.	O
</s>
<s>
The	O
engineering	O
group	O
within	O
Apple	O
responsible	O
for	O
System	B-Operating_System
7	I-Operating_System
came	O
to	O
be	O
known	O
as	O
the	O
"	O
Blue	O
Meanies	O
"	O
,	O
named	O
after	O
the	O
blue	O
index	O
cards	O
on	O
which	O
were	O
written	O
the	O
features	O
that	O
could	O
be	O
implemented	O
in	O
a	O
relatively	O
short	O
time	O
as	O
part	O
of	O
Apple	O
's	O
operating	B-General_Concept
system	I-General_Concept
strategy	O
.	O
</s>
<s>
In	O
comparison	O
,	O
the	O
pink	O
index	O
card	O
features	O
were	O
handled	O
by	O
the	O
Pink	O
group	O
,	O
later	O
becoming	O
the	O
ill-fated	O
Taligent	B-Operating_System
project	O
.	O
</s>
<s>
System	O
7.0	O
was	O
the	O
last	O
version	O
of	O
the	O
Macintosh	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
that	O
was	O
available	O
at	O
no	O
charge	O
and	O
could	O
be	O
freely	O
redistributed	O
.	O
</s>
<s>
Although	O
System	B-Operating_System
7	I-Operating_System
could	O
be	O
purchased	O
from	O
Apple	O
,	O
the	O
cost	O
was	O
nominal	O
and	O
considered	O
to	O
only	O
cover	O
duplication	O
and	O
media	O
.	O
</s>
<s>
It	O
was	O
common	O
for	O
Macintosh	B-Device
dealers	O
to	O
allow	O
customers	O
to	O
use	O
the	O
store	O
's	O
demo	O
machines	O
to	O
copy	O
System	B-Operating_System
7	I-Operating_System
install	O
disks	O
for	O
the	O
cost	O
of	O
a	O
box	O
of	O
floppies	B-Device
.	O
</s>
<s>
CD-ROM	O
magazines	O
such	O
as	O
Nautilus	O
included	O
System	B-Operating_System
7	I-Operating_System
on	O
their	O
disks	O
.	O
</s>
<s>
After	O
Mac	B-Device
users	O
downloaded	O
thousands	O
of	O
copies	O
of	O
System	B-Operating_System
7	I-Operating_System
from	O
the	O
online	O
services	O
(	O
AOL	O
,	O
CompuServe	O
and	O
GEnie	O
)	O
,	O
Apple	O
surveyed	O
the	O
services	O
and	O
based	O
on	O
this	O
popularity	O
started	O
selling	O
the	O
Mac	B-Application
OS	I-Application
as	O
a	O
retail	O
product	O
with	O
System	O
7.1	O
.	O
</s>
<s>
Apple	O
continued	O
charging	O
for	O
major	O
operating	B-General_Concept
system	I-General_Concept
upgrades	O
until	O
the	O
release	O
of	O
OS	B-Operating_System
X	I-Operating_System
Mavericks	I-Operating_System
in	O
2013	O
.	O
</s>
<s>
Soon	O
after	O
the	O
initial	O
release	O
of	O
System	B-Operating_System
7	I-Operating_System
,	O
the	O
7.0.1	O
minor	O
update	O
was	O
released	O
in	O
October	O
1991	O
,	O
which	O
updated	O
the	O
Portable	O
and	O
Brightness	O
control	B-Operating_System
panels	I-Operating_System
,	O
added	O
the	O
Caps	O
Lock	O
extension	O
,	O
which	O
showed	O
an	O
up-pointing	O
arrow	O
onscreen	O
if	O
the	O
Caps	O
Lock	O
key	O
was	O
depressed	O
on	O
PowerBooks	B-Device
,	O
and	O
added	O
the	O
Cache	O
Switch	O
control	B-Operating_System
panel	I-Operating_System
in	O
additional	O
to	O
RAM	B-Architecture
disk	O
and	O
sound	O
management	O
optimizations	O
for	O
68040	B-Device
systems	O
.	O
</s>
<s>
Three	O
small	O
patches	O
called	O
"	O
System	B-Operating_System
7	I-Operating_System
Tune-Up	O
"	O
also	O
followed	O
,	O
which	O
initially	O
added	O
an	O
extension	O
"	O
System	B-Operating_System
7	I-Operating_System
Tuner	O
"	O
that	O
improves	O
memory	O
management	O
by	O
quitting	O
unused	O
items	O
,	O
like	O
apps	O
and	O
AppleTalk	B-Application
,	O
and	O
added	O
"	O
minimum	O
"	O
and	O
"	O
preferred	O
"	O
memory	O
allotments	O
to	O
an	O
application	B-Application
's	O
Get	O
Info	O
box	O
in	O
its	O
1.0	O
version	O
.	O
</s>
<s>
This	O
would	O
be	O
followed	O
by	O
version	O
1.1	O
,	O
which	O
updated	O
the	O
"	O
System	B-Operating_System
7	I-Operating_System
Tuner	O
"	O
extension	O
to	O
1.1	O
,	O
included	O
LaserWriter	O
driver	O
version	O
7.1.1	O
and	O
added	O
a	O
hidden	O
extension	O
called	O
"	O
Tuna	O
Helper	O
"	O
,	O
intended	O
to	O
fix	O
the	O
"	O
disappearing	O
files	O
"	O
bug	O
in	O
which	O
the	O
system	O
would	O
lose	O
files	O
.	O
</s>
<s>
The	O
final	O
release	O
,	O
1.1.1	O
,	O
would	O
include	O
every	O
thing	O
1.1	O
included	O
but	O
also	O
add	O
the	O
StyleWriter	O
7.2.2	O
printer	O
drivers	O
,	O
Chooser	B-Operating_System
7.1	O
and	O
a	O
minor	O
update	O
to	O
Tuna	O
Helper	O
.	O
</s>
<s>
This	O
was	O
the	O
first	O
version	O
of	O
the	O
system	B-Application
software	I-Application
that	O
Apple	O
charged	O
money	O
for	O
.	O
</s>
<s>
This	O
replaced	O
the	O
often	O
time-consuming	O
method	O
of	O
dragging	O
fonts	O
to	O
and	O
from	O
the	O
System	B-Application
file	I-Application
,	O
introduced	O
in	O
System	O
7.0	O
;	O
it	O
also	O
replaced	O
the	O
Font/DA	B-Application
Mover	I-Application
application	B-Application
from	O
System	B-Protocol
6	I-Protocol
,	O
which	O
could	O
also	O
be	O
used	O
with	O
7.0	O
.	O
</s>
<s>
It	O
was	O
also	O
the	O
first	O
version	O
to	O
support	O
"	O
Enablers	O
"	O
,	O
which	O
removed	O
the	O
requirement	O
to	O
release	O
a	O
new	O
version	O
of	O
the	O
system	B-Application
software	I-Application
every	O
time	O
new	O
hardware	O
was	O
released	O
.	O
</s>
<s>
A	O
set	O
of	O
specialized	O
versions	O
of	O
7.1	O
,	O
ranging	O
from	O
7.1P1	O
to	O
7.1P6	O
(	O
excluding	O
7.1P4	O
)	O
were	O
created	O
and	O
included	O
with	O
various	O
Performa	B-Device
models	O
that	O
were	O
already	O
available	O
or	O
were	O
released	O
after	O
7.1	O
.	O
</s>
<s>
These	O
specialized	O
versions	O
included	O
At	B-Operating_System
Ease	I-Operating_System
,	O
Launcher	O
,	O
and	O
some	O
other	O
changes	O
that	O
were	O
integrated	O
into	O
later	O
versions	O
of	O
the	O
system	B-Application
software	I-Application
.	O
</s>
<s>
The	O
first	O
major	O
upgrade	O
was	O
System	O
7.1.1	O
,	O
also	O
known	O
as	O
"	O
System	B-Operating_System
7	I-Operating_System
Pro	O
"	O
.	O
</s>
<s>
This	O
release	O
was	O
a	O
bundle	O
of	O
7.1	O
with	O
AppleScript	B-Application
tools	O
,	O
QuickTime	B-Application
and	O
Apple	O
Open	O
Collaboration	O
Environment	O
(	O
AOCE	O
)	O
.	O
</s>
<s>
While	O
System	B-Operating_System
7	I-Operating_System
had	O
some	O
trouble	O
running	O
on	O
slightly	O
older	O
machines	O
due	O
to	O
its	O
memory	O
footprint	O
,	O
System	B-Operating_System
7	I-Operating_System
Pro	O
barely	O
fit	O
into	O
any	O
Macintosh	B-Device
computers	I-Device
of	O
the	O
time	O
.	O
</s>
<s>
Apple	O
joined	O
the	O
AIM	O
alliance	O
(	O
Apple	O
,	O
IBM	O
and	O
Motorola	O
)	O
shortly	O
after	O
the	O
release	O
of	O
System	B-Operating_System
7	I-Operating_System
in	O
1991	O
,	O
and	O
started	O
work	O
on	O
PowerPC-based	O
machines	O
that	O
later	O
became	O
the	O
Power	B-Device
Macintosh	I-Device
family	O
.	O
</s>
<s>
Support	O
for	O
these	O
machines	O
resulted	O
in	O
System	B-Operating_System
7.1.2	I-Operating_System
.	O
</s>
<s>
System	B-Operating_System
7.1.2	I-Operating_System
was	O
never	O
offered	O
for	O
retail	O
sale	O
;	O
it	O
shipped	O
with	O
the	O
first	O
batches	O
of	O
the	O
PowerPC	B-Architecture
Macs	B-Device
and	O
a	O
68k	B-Device
version	O
shipped	O
with	O
a	O
small	O
number	O
of	O
Quadra	O
600	O
series	O
systems	O
.	O
</s>
<s>
System	O
7.1.2P	O
was	O
the	O
same	O
as	O
7.1.2	O
,	O
and	O
shipped	O
with	O
the	O
Performa	B-Device
630	I-Device
,	I-Device
LC	I-Device
630	I-Device
and	I-Device
Quadra	I-Device
630	I-Device
models	O
that	O
were	O
released	O
between	O
July	O
and	O
November	O
1994	O
.	O
</s>
<s>
WindowShade	O
,	O
another	O
former	O
shareware	O
control	B-Operating_System
panel	I-Operating_System
,	O
provided	O
the	O
ability	O
to	O
condense	O
a	O
window	O
down	O
to	O
its	O
title	O
bar	O
.	O
</s>
<s>
Introduced	O
as	O
a	O
"	O
minimize	O
"	O
feature	O
to	O
compete	O
with	O
Windows	B-Application
95	I-Application
as	O
Mac	B-Application
OS	I-Application
had	O
no	O
taskbar	O
or	O
dock	O
.	O
</s>
<s>
MacTCP	B-Operating_System
was	O
bundled	O
,	O
enabling	O
any	O
Macintosh	B-Device
to	O
connect	O
to	O
the	O
Internet	O
out	O
of	O
the	O
box	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
The	O
Control	O
Strip	O
(	O
a	O
fast	O
way	O
to	O
change	O
the	O
system	O
volume	O
,	O
control	O
the	O
playback	O
of	O
audio	O
CDs	O
,	O
manage	O
file	O
sharing	O
and	O
printers	O
and	O
change	O
the	O
monitor	O
resolution	O
and	O
color	O
depth	O
)	O
was	O
enabled	O
on	O
desktop	O
Macintosh	B-Device
models	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
It	O
had	O
previously	O
only	O
been	O
included	O
with	O
the	O
PowerBook	B-Device
series	O
.	O
</s>
<s>
A	O
new	O
Desktop	O
Patterns	O
control	B-Operating_System
panel	I-Operating_System
allowed	O
for	O
tiled	O
patterns	O
up	O
to	O
128x128	O
pixels	O
with	O
8-bit	O
color	O
;	O
previous	O
versions	O
were	O
limited	O
to	O
8x8	O
pixel	O
tiles	O
with	O
a	O
maximum	O
of	O
eight	O
possible	O
colors	O
.	O
</s>
<s>
Similar	O
functionality	O
was	O
found	O
on	O
earlier	O
system	O
versions	O
exclusive	O
to	O
Performa	B-Device
models	O
and	O
was	O
housed	O
in	O
the	O
General	O
Controls	O
panel	O
.	O
</s>
<s>
PowerTalk	O
,	O
a	O
system-level	O
email	O
handling	O
service	O
and	O
the	O
originator	O
of	O
the	O
Keychain	B-Application
system	O
.	O
</s>
<s>
System	O
7.5	O
was	O
codenamed	O
"	O
Capone	O
"	O
,	O
a	O
reference	O
to	O
Al	O
Capone	O
and	O
"	O
Chicago	O
"	O
,	O
which	O
was	O
the	O
code	O
name	O
for	O
Microsoft	O
's	O
Windows	B-Application
95	I-Application
,	O
and	O
was	O
also	O
the	O
name	O
of	O
the	O
default	O
system	O
font	O
used	O
in	O
Mac	B-Application
OS	I-Application
until	O
version	O
8	O
.	O
</s>
<s>
System	B-Operating_System
7.5.1	I-Operating_System
was	O
primarily	O
a	O
bug	O
fix	O
of	O
7.5	O
,	O
but	O
also	O
introduced	O
a	O
new	O
"	O
Mac	B-Application
OS	I-Application
"	O
startup	O
screen	O
in	O
preparation	O
for	O
Mac	B-Device
clones	I-Device
.	O
</s>
<s>
System	O
7.5.2	O
,	O
released	O
only	O
for	O
the	O
first	O
PCI-based	O
Power	B-Device
Macs	I-Device
,	O
was	O
notable	O
for	O
introducing	O
Apple	O
's	O
new	O
networking	O
architecture	O
,	O
Open	B-Protocol
Transport	I-Protocol
.	O
</s>
<s>
System	B-Operating_System
7.5.3	I-Operating_System
,	O
a	O
major	O
bug-fix	O
update	O
that	O
also	O
included	O
Open	B-Protocol
Transport	I-Protocol
for	O
other	O
PowerPC-based	O
machines	O
as	O
well	O
as	O
some	O
68k-based	O
machines	O
.	O
</s>
<s>
7.5.3	O
also	O
made	O
several	O
improvements	O
to	O
the	O
68k	B-Device
emulator	B-Application
,	O
and	O
added	O
translucent	O
dragging	O
support	O
to	O
the	O
Drag	O
Manager	O
.	O
</s>
<s>
It	O
also	O
included	O
the	O
first	O
version	O
of	O
Control	O
Strip	O
to	O
be	O
compatible	O
with	O
all	O
Macs	B-Device
.	O
</s>
<s>
This	O
was	O
also	O
the	O
first	O
version	O
of	O
Mac	B-Application
OS	I-Application
to	O
support	O
SMP	B-Operating_System
(	O
9500/MP	O
)	O
.	O
</s>
<s>
System	B-Operating_System
7.5.3	I-Operating_System
Revision	O
2	O
included	O
:	O
performance	O
enhancements	O
;	O
better	O
reliability	O
for	O
PowerBooks	B-Device
using	O
the	O
third-party	O
RAM	B-Architecture
Doubler	O
program	O
;	O
improved	O
reliability	O
for	O
PowerBook	B-Device
500	O
,	O
2300	O
,	O
and	O
5300	O
series	O
computers	O
with	O
the	O
PowerPC	B-Architecture
Upgrade	O
Card	O
;	O
improved	O
reliability	O
when	O
using	O
the	O
Startup	O
Disk	O
control	B-Operating_System
panel	I-Operating_System
;	O
and	O
improved	O
reliability	O
when	O
copying	O
files	O
to	O
1GB	O
hard	B-Device
disks	I-Device
.	O
</s>
<s>
System	B-Operating_System
7.5.3	I-Operating_System
Revision	O
2.1	O
was	O
shipped	O
with	O
the	O
Performa	O
6400/180	O
and	O
6400/200	O
;	O
this	O
particular	O
release	O
was	O
specific	O
to	O
these	O
machines	O
as	O
there	O
were	O
stability	O
problems	O
with	O
System	B-Operating_System
7.5.3	I-Operating_System
Release	O
2	O
on	O
the	O
new	O
hardware	O
,	O
especially	O
with	O
the	O
video	O
card	O
and	O
transferring	O
files	O
over	O
LocalTalk	O
.	O
</s>
<s>
System	O
7.5.5	O
included	O
significant	O
performance	O
improvements	O
for	O
virtual	B-Architecture
memory	I-Architecture
and	O
memory	O
management	O
on	O
PowerPC-based	O
Macs	B-Device
,	O
including	O
the	O
elimination	O
of	O
one	O
type	O
11	O
error	O
.	O
</s>
<s>
Also	O
included	O
were	O
a	O
number	O
of	O
reliability	O
improvements	O
,	O
such	O
as	O
fixes	O
for	O
Macs	B-Device
using	O
floppy	B-Device
disks	I-Device
equipped	O
with	O
a	O
DOS	O
compatibility	O
card	O
,	O
improved	O
hard	B-Device
disk	I-Device
access	O
for	O
PowerPC	B-Architecture
PowerBooks	B-Device
and	O
Performa	B-Device
5400	I-Device
through	O
9500	O
computers	O
,	O
fixes	O
for	O
Macs	B-Device
that	O
included	O
an	O
Apple	O
TV	O
Tuner	O
or	O
Macintosh	B-Device
TV	O
Remote	O
Control	O
,	O
improvements	O
to	O
LocalTalk	O
and	O
networking	O
(	O
especially	O
for	O
the	O
Performa	B-Device
5400	I-Device
and	O
6400	O
)	O
,	O
fixes	O
to	O
system	O
startup	O
for	O
the	O
faster	O
180MHz	O
Macs	B-Device
(	O
which	O
included	O
PowerPC	B-Architecture
604	O
or	O
604e	O
processors	O
)	O
,	O
improved	O
reliability	O
when	O
using	O
sound-intensive	O
applications	O
on	O
Quadra	O
or	O
Centris	O
computers	O
that	O
contained	O
the	O
PowerPC	B-Architecture
upgrade	O
card	O
,	O
and	O
improved	O
stability	O
when	O
using	O
multiple	O
background	O
applications	O
and	O
shared	O
printers	O
on	O
a	O
network	O
.	O
</s>
<s>
System	O
7.5.5	O
is	O
also	O
the	O
last	O
System	B-Operating_System
7	I-Operating_System
release	O
that	O
can	O
run	O
on	O
68000-based	O
Macs	B-Device
such	O
as	O
the	O
Macintosh	B-Device
Plus	I-Device
and	O
Macs	B-Device
with	O
ROMs	O
that	O
lack	O
support	O
for	O
32-bit	O
addressing	O
such	O
as	O
Macintosh	B-Device
IIcx	I-Device
.	O
</s>
<s>
With	O
7.6	O
,	O
the	O
operating	B-General_Concept
system	I-General_Concept
was	O
officially	O
called	O
"	O
Mac	B-Application
OS	I-Application
"	O
instead	O
of	O
"	O
System	O
"	O
.	O
</s>
<s>
New	O
features	O
include	O
a	O
revamped	O
Extensions	B-Operating_System
Manager	I-Operating_System
,	O
more	O
native	O
PowerPC	B-Architecture
code	O
for	O
Power	B-Device
Macs	I-Device
,	O
more	O
bundled	O
Internet	O
tools	O
and	O
utilities	O
,	O
and	O
a	O
more	O
stable	O
Finder	O
with	O
increased	O
memory	O
allocation	O
.	O
</s>
<s>
In	O
this	O
version	O
,	O
the	O
PowerTalk	O
feature	O
added	O
in	O
7.5	O
was	O
removed	O
due	O
to	O
poor	O
application	B-Application
support	O
,	O
and	O
support	O
for	O
a	O
large	O
number	O
of	O
older	O
Macintosh	B-Device
models	O
was	O
dropped	O
.	O
</s>
<s>
The	O
minor	O
update	O
to	O
Mac	O
OS	O
7.6.1	O
finally	O
ported	O
the	O
68k	B-Device
exception	O
handling	O
routines	O
to	O
PowerPC	B-Architecture
,	O
turning	O
type	O
11	O
errors	O
into	O
less	O
harmful	O
errors	O
(	O
type	O
1	O
,	O
2	O
or	O
3	O
,	O
usually	O
)	O
as	O
crashing	O
applications	O
would	O
more	O
often	O
terminate	O
safely	O
instead	O
of	O
crashing	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Through	O
this	O
period	O
,	O
Apple	O
had	O
been	O
attempting	O
to	O
release	O
a	O
completely	O
new	O
"	O
modern	O
"	O
operating	B-General_Concept
system	I-General_Concept
,	O
named	O
Copland	B-Application
.	O
</s>
<s>
When	O
the	O
Copland	B-Application
project	O
was	O
abandoned	O
in	O
1996	O
,	O
Apple	O
announced	O
plans	O
to	O
release	O
an	O
OS	O
update	O
every	O
six	O
months	O
until	O
Rhapsody	B-Operating_System
(	O
which	O
would	O
by	O
2001	O
evolve	O
into	O
what	O
was	O
released	O
as	O
Mac	B-Application
OS	I-Application
X	I-Application
)	O
shipped	O
.	O
</s>
<s>
Two	O
more	O
releases	O
were	O
shipped	O
,	O
now	O
officially	O
branded	O
as	O
"	O
Mac	B-Application
OS	I-Application
"	O
Mac	B-Application
OS	I-Application
7.6	O
and	O
the	O
minor	O
bug	O
fix	O
7.6.1	O
.	O
</s>
<s>
Future	O
versions	O
were	O
released	O
as	O
Mac	B-Operating_System
OS	I-Operating_System
8	I-Operating_System
–	I-Operating_System
8.6	I-Operating_System
and	O
Mac	B-Operating_System
OS	I-Operating_System
9	I-Operating_System
–	I-Operating_System
9.2	I-Operating_System
.	O
</s>
<s>
Likely	O
due	O
to	O
coming	O
out	O
during	O
a	O
troubled	O
time	O
in	O
Apple	O
's	O
history	O
,	O
7.6	O
is	O
known	O
for	O
having	O
a	O
number	O
of	O
bugs	O
,	O
most	O
notably	O
the	O
inability	O
to	O
customize	O
what	O
components	O
are	O
installed	O
during	O
installation	O
and	O
its	O
tendency	O
to	O
crash	O
on	O
some	O
systems	O
when	O
they	O
are	O
shut	O
down	O
whilst	O
a	O
RAM	B-Architecture
disk	O
is	O
in	O
use	O
.	O
</s>
