<s>
System	B-Operating_System
6	I-Operating_System
(	O
or	O
System	B-Operating_System
Software	I-Operating_System
6	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	O
,	O
made	O
by	O
Apple	O
Computer	O
It	O
was	O
released	O
in	O
1988	O
,	O
and	O
is	O
part	O
of	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
series	O
.	O
</s>
<s>
It	O
is	O
a	O
monolithic	B-Architecture
operating	B-General_Concept
system	I-General_Concept
,	O
with	O
cooperative	B-Operating_System
multitasking	I-Operating_System
based	O
on	O
an	O
improved	O
MultiFinder	O
.	O
</s>
<s>
The	O
boxed	O
version	O
cost	O
,	O
and	O
it	O
was	O
included	O
with	O
all	O
new	O
Macintosh	B-Device
computers	O
until	O
1991	O
,	O
when	O
it	O
was	O
succeeded	O
by	O
System	B-Operating_System
7	I-Operating_System
.	O
</s>
<s>
The	O
MacroMaker	O
utility	O
was	O
introduced	O
in	O
System	B-Operating_System
6	I-Operating_System
.	O
</s>
<s>
MacroMaker	O
is	O
not	O
compatible	O
with	O
System	B-Operating_System
7	I-Operating_System
,	O
in	O
which	O
it	O
is	O
succeeded	O
by	O
AppleScript	B-Application
.	O
</s>
<s>
Macintosh	B-Device
gained	O
cooperative	B-Operating_System
multitasking	I-Operating_System
in	O
March	O
1985	O
with	O
Andy	O
Hertzfeld	O
's	O
Switcher	O
,	O
which	O
can	O
switch	O
between	O
multiple	O
full-screen	O
applications	O
.	O
</s>
<s>
Systems	O
5	O
and	O
6	O
have	O
MultiFinder	O
instead	O
,	O
which	O
is	O
much	O
more	O
mature	O
and	O
widely	O
used	O
in	O
System	B-Operating_System
6	I-Operating_System
.	O
</s>
<s>
With	O
MultiFinder	O
,	O
the	O
Finder	B-Application
does	O
not	O
quit	O
to	O
free	O
resources	O
,	O
and	O
the	O
system	O
behaves	O
as	O
in	O
the	O
still-familiar	O
multitasking	O
fashion	O
,	O
with	O
the	O
desktop	O
and	O
other	O
applications	O
 '	O
windows	O
in	O
the	O
background	O
.	O
</s>
<s>
System	B-Operating_System
6	I-Operating_System
includes	O
support	O
for	O
the	O
Apple	O
ImageWriter	O
LQ	O
and	O
PostScript	B-Language
laser	O
printers	O
.	O
</s>
<s>
New	O
software	B-Application
drivers	I-Application
allow	O
the	O
ImageWriter	O
LQ	O
to	O
be	O
used	O
on	O
AppleTalk	B-Application
local	O
area	O
networks	O
and	O
supports	O
the	O
use	O
of	O
tabloid	O
or	O
B-size	O
paper	O
(	O
)	O
.	O
</s>
<s>
System	B-Operating_System
6	I-Operating_System
includes	O
QuickerGraf	O
(	O
originally	O
QuickerDraw	O
)	O
,	O
system	B-Application
software	I-Application
used	O
to	O
accelerate	O
the	O
drawing	O
of	O
color	O
images	O
on	O
the	O
Macintosh	B-Device
II	I-Device
.	O
</s>
<s>
In	O
comparison	O
to	O
the	O
NeXTSTEP	B-Application
operating	B-General_Concept
system	I-General_Concept
of	O
the	O
time	O
,	O
System	B-Operating_System
6	I-Operating_System
does	O
not	O
make	O
much	O
use	O
of	O
sound	O
,	O
and	O
its	O
user	O
interface	O
is	O
limited	O
in	O
file	O
management	O
and	O
window	O
displays	O
.	O
</s>
<s>
System	B-Operating_System
6	I-Operating_System
's	O
Apple	O
menu	O
cannot	O
be	O
used	O
to	O
launch	O
applications	O
.	O
</s>
<s>
System	B-Operating_System
6	I-Operating_System
supports	O
24bits	O
of	O
addressable	O
RAM	B-Architecture
(	O
random	B-Architecture
access	I-Architecture
memory	I-Architecture
)	O
,	O
which	O
allows	O
for	O
a	O
maximum	O
of	O
8megabytes	O
of	O
RAM	B-Architecture
,	O
with	O
no	O
provision	O
for	O
virtual	B-Architecture
memory	I-Architecture
.	O
</s>
<s>
These	O
limitations	O
were	O
removed	O
in	O
System	B-Operating_System
7	I-Operating_System
.	O
</s>
<s>
System	B-Operating_System
6	I-Operating_System
's	O
version	O
of	O
the	O
HFS	B-Application
file	O
system	O
also	O
has	O
a	O
volume	B-Application
size	O
limit	O
;	O
it	O
supports	O
up	O
to	O
2gigabytes	O
(	O
GB	O
)	O
and	O
65,536	O
files	O
on	O
any	O
one	O
volume	B-Application
.	O
</s>
<s>
The	O
Trash	O
(	O
known	O
as	O
the	O
"	O
Wastebasket	O
"	O
in	O
the	O
British-English	O
version	O
)	O
empties	O
when	O
the	O
Finder	B-Application
terminates	O
.	O
</s>
<s>
Icons	O
on	O
the	O
Desktop	O
in	O
System	B-Operating_System
6	I-Operating_System
are	O
not	O
organized	O
into	O
a	O
single	O
folder	O
,	O
as	O
in	O
later	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
This	O
is	O
inefficient	O
and	O
confusing	O
,	O
as	O
the	O
user	O
cannot	O
browse	O
to	O
the	O
Desktop	O
in	O
applications	O
besides	O
the	O
Finder	B-Application
,	O
even	O
within	O
the	O
standard	O
Open	O
and	O
Save	O
As	O
dialog	O
boxes	O
.	O
</s>
<s>
The	O
lack	O
of	O
aliases	O
,	O
shortcuts	O
to	O
files	O
,	O
is	O
another	O
limitation	O
of	O
file	O
management	O
on	O
System	B-Operating_System
6	I-Operating_System
,	O
and	O
custom	O
file	O
and	O
folder	O
icons	O
are	O
not	O
supported	O
.	O
</s>
<s>
These	O
issues	O
were	O
all	O
remedied	O
in	O
System	B-Operating_System
7	I-Operating_System
.	O
</s>
<s>
A	O
maximum	O
of	O
15	O
desk	B-Application
accessories	I-Application
may	O
be	O
installed	O
at	O
one	O
time	O
,	O
including	O
the	O
Chooser	O
,	O
Scrapbook	O
,	O
and	O
Control	O
Panel	O
.	O
</s>
<s>
System	B-Operating_System
6	I-Operating_System
uses	O
the	O
Control	O
Panel	O
desk	B-Application
accessory	I-Application
to	O
access	O
all	O
the	O
installed	O
control	O
panels	O
,	O
which	O
imposes	O
severe	O
user-interface	O
limitations	O
.	O
</s>
<s>
Desk	B-Application
Accessories	I-Application
cannot	O
be	O
installed	O
or	O
removed	O
within	O
the	O
Finder	B-Application
;	O
this	O
requires	O
the	O
Font/DA	B-Application
Mover	I-Application
utility	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
also	O
fixed	O
this	O
.	O
</s>
<s>
The	O
Finder	B-Application
allows	O
each	O
icon	O
to	O
be	O
assigned	O
a	O
color	O
,	O
but	O
the	O
desktop	O
background	O
is	O
limited	O
to	O
an	O
8x8-pixel	O
color	O
tiled	O
pattern	O
(	O
color	O
patterns	O
were	O
introduced	O
in	O
System	O
5	O
)	O
,	O
and	O
standard	O
window	O
frames	O
are	O
black-and-white	O
.	O
</s>
<s>
However	O
,	O
many	O
"	O
INIT	B-Operating_System
"	O
extension	B-Operating_System
files	O
exist	O
to	O
add	O
color	O
and	O
customization	O
.	O
</s>
<s>
System	B-Operating_System
7	I-Operating_System
allows	O
the	O
user	O
to	O
change	O
the	O
color	O
of	O
window	O
frames	O
and	O
various	O
other	O
aspects	O
of	O
the	O
user	O
interface	O
.	O
</s>
<s>
By	O
1989	O
,	O
the	O
System	B-Operating_System
6	I-Operating_System
user	O
interface	O
was	O
in	O
need	O
of	O
a	O
change	O
.	O
</s>
<s>
Initial	O
releases	O
of	O
System	B-Operating_System
6	I-Operating_System
are	O
unstable	O
;	O
many	O
third-party	O
developers	O
did	O
not	O
receive	O
advance	O
copies	O
,	O
resulting	O
in	O
widespread	O
compatibility	O
issues	O
.	O
</s>
<s>
The	O
contemporary	O
versions	O
of	O
many	O
common	O
programs	O
such	O
as	O
Microsoft	B-Application
Excel	I-Application
,	O
Microsoft	B-Application
Works	I-Application
and	O
4th	B-Language
Dimension	I-Language
were	O
not	O
fully	O
compatible	O
with	O
System	B-Operating_System
6	I-Operating_System
.	O
</s>
<s>
There	O
were	O
also	O
software	O
bugs	O
in	O
the	O
Color	O
Manager	O
,	O
Script	O
Manager	O
,	O
and	O
Sound	O
Manager	O
extension	B-Operating_System
files	O
.	O
</s>
<s>
Some	O
customers	O
waited	O
longer	O
until	O
moving	O
to	O
System	B-Operating_System
6	I-Operating_System
because	O
of	O
its	O
poor	O
reputation	O
.	O
</s>
<s>
System	B-Operating_System
6	I-Operating_System
was	O
officially	O
supported	O
by	O
Apple	O
for	O
many	O
different	O
machines	O
,	O
some	O
of	O
which	O
shipped	O
with	O
it	O
.	O
</s>
<s>
Some	O
unsupported	O
Macintosh	B-Device
computers	O
can	O
run	O
it	O
with	O
limitations	O
.	O
</s>
<s>
System	O
version	O
Release	O
date	O
Finder	B-Application
version	O
MultiFinder	O
version	O
LaserWriter	O
version	O
Release	O
information	O
6.0	O
April	O
1988	O
6.1	O
6.05.2	O
Initial	O
release	O
6.0.1	O
September	O
19	O
,	O
1988	O
6.1.1	O
6.0.1	O
Release	O
for	O
Macintosh	B-Device
IIx	I-Device
(	O
1988	O
)	O
6.0.2	O
September	O
19	O
,	O
19886.1	O
6.0.1	O
Maintenance	O
release	O
6.0.3	O
December	O
23	O
,	O
1988	O
6.0.3	O
Maintenance	O
release	O
with	O
bug	O
fixes	O
for	O
Apple	O
File	O
Exchange	O
,	O
Time	O
Manager	O
,	O
and	O
other	O
components	O
.	O
</s>
<s>
6.0.4	O
September	O
20	O
,	O
1989	O
6.1.4	O
6.0.4	O
Release	O
for	O
Macintosh	B-Device
Portable	I-Device
and	O
IIci	B-Device
(	O
1989	O
)	O
6.0.5	O
March	O
19	O
,	O
1990	O
6.1.5	O
6.0.5	O
Release	O
for	O
Macintosh	B-Device
IIfx	I-Device
(	O
1990	O
)	O
6.0.6	O
March	O
19	O
,	O
1990	O
-	O
October	O
15	O
,	O
1990	O
6.1.6	O
6.0.6	O
Packed	O
with	O
early	O
Macintosh	B-Device
IIsi	I-Device
,	O
LC	B-Device
,	O
and	O
Classic	B-Device
;	O
contains	O
bugs	O
with	O
keyboard	O
and	O
AppleTalk	B-Application
.	O
</s>
<s>
6.0.7	O
October	O
15	O
,	O
1990	O
6.1.7	O
6.0.7	O
Official	O
release	O
for	O
Macintosh	B-Device
LC	I-Device
,	O
IIsi	B-Device
,	O
and	O
Classic	B-Device
(	O
1990	O
)	O
6.0.8	O
May	O
13	O
,	O
19916.1.86.0.87.0	O
Updated	O
printing	O
software	O
to	O
match	O
the	O
printing	O
software	O
of	O
System	B-Operating_System
7.0	I-Operating_System
6.0.8L	O
March	O
23	O
,	O
1992	O
Used	O
only	O
on	O
the	O
Macintosh	B-Device
Classic	I-Device
,	O
Classic	B-Device
II	I-Device
,	O
LC	B-Device
,	O
LC	B-Device
II	I-Device
,	O
and	O
PowerBook	B-Device
100	I-Device
.	O
</s>
