<s>
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
(	O
version	O
10.6	B-Device
)	O
is	O
the	O
seventh	O
major	O
release	O
of	O
macOS	B-Application
,	O
Apple	O
's	O
desktop	O
and	O
server	O
operating	B-General_Concept
system	I-General_Concept
for	O
Macintosh	B-Device
computers	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
was	O
publicly	O
unveiled	O
on	O
June	O
8	O
,	O
2009	O
at	O
Apple	O
’s	O
Worldwide	O
Developers	O
Conference	O
.	O
</s>
<s>
As	O
a	O
result	O
of	O
the	O
low	O
price	O
,	O
initial	O
sales	O
of	O
Snow	B-Device
Leopard	I-Device
were	O
significantly	O
higher	O
than	O
that	O
of	O
its	O
predecessors	O
whose	O
price	O
started	O
at	O
US$129	O
.	O
</s>
<s>
The	O
release	O
of	O
Snow	B-Device
Leopard	I-Device
came	O
nearly	O
two	O
years	O
after	O
the	O
launch	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
,	O
the	O
second	O
longest	O
time	O
span	O
between	O
successive	O
Mac	B-Device
OS	I-Device
X	I-Device
releases	O
(	O
the	O
time	O
span	O
between	O
Tiger	B-Application
and	O
Leopard	B-Application
was	O
the	O
longest	O
)	O
.	O
</s>
<s>
Unlike	O
previous	O
versions	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
,	O
the	O
goals	O
of	O
Snow	B-Device
Leopard	I-Device
were	O
improved	O
performance	O
,	O
greater	O
efficiency	O
and	O
the	O
reduction	O
of	O
its	O
overall	O
memory	O
footprint	O
.	O
</s>
<s>
Apple	O
famously	O
marketed	O
Snow	B-Device
Leopard	I-Device
as	O
having	O
"	O
zero	O
new	O
features	O
"	O
.	O
</s>
<s>
Its	O
name	O
signified	O
its	O
goal	O
to	O
be	O
a	O
refinement	O
of	O
the	O
previous	O
OS	O
X	O
version	O
,	O
Leopard	B-Application
.	O
</s>
<s>
Much	O
of	O
the	O
software	O
in	O
Mac	B-Device
OS	I-Device
X	I-Device
was	O
extensively	O
rewritten	O
for	O
this	O
release	O
in	O
order	O
to	O
take	O
full	O
advantage	O
of	O
modern	O
Macintosh	B-Device
hardware	O
and	O
software	O
technologies	O
(	O
64-bit	B-Device
,	O
Cocoa	B-Operating_System
,	O
etc	O
.	O
)	O
.	O
</s>
<s>
New	O
programming	O
frameworks	O
,	O
such	O
as	O
OpenCL	B-Application
,	O
were	O
created	O
,	O
allowing	O
software	O
developers	O
to	O
use	O
graphics	B-Device
cards	I-Device
in	O
their	O
applications	O
.	O
</s>
<s>
It	O
was	O
also	O
the	O
first	O
Mac	B-Application
OS	I-Application
release	O
since	O
System	B-Operating_System
7.1.1	I-Operating_System
to	O
not	O
support	O
Macs	O
using	O
PowerPC	B-Architecture
processors	I-Architecture
,	O
as	O
Apple	O
dropped	O
support	O
for	O
them	O
and	O
focused	O
on	O
Intel-based	B-Device
products	I-Device
.	O
</s>
<s>
As	O
support	O
for	O
Rosetta	B-Operating_System
was	O
dropped	O
in	O
Mac	B-Application
OS	I-Application
X	I-Application
Lion	I-Application
,	O
Snow	B-Device
Leopard	I-Device
is	O
the	O
last	O
version	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
that	O
is	O
able	O
to	O
run	O
PowerPC-only	O
applications	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
was	O
succeeded	O
by	O
OS	B-Application
X	I-Application
Lion	I-Application
(	O
version	O
10.7	B-Application
)	O
on	O
July	O
20	O
,	O
2011	O
.	O
</s>
<s>
For	O
several	O
years	O
,	O
Apple	O
continued	O
to	O
sell	O
Snow	B-Device
Leopard	I-Device
at	O
its	O
online	O
store	O
for	O
the	O
benefit	O
of	O
users	O
that	O
required	O
Snow	B-Device
Leopard	I-Device
in	O
order	O
to	O
upgrade	O
to	O
later	O
versions	O
of	O
OS	O
X	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
was	O
the	O
last	O
version	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
to	O
be	O
distributed	O
primarily	O
through	O
optical	B-Device
disc	I-Device
,	O
as	O
all	O
further	O
releases	O
were	O
mainly	O
distributed	O
through	O
the	O
Mac	B-Application
App	I-Application
Store	I-Application
introduced	O
in	O
the	O
Snow	B-Device
Leopard	I-Device
10.6.6	O
update	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
was	O
the	O
last	O
release	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
to	O
support	O
the	O
32-bit	O
Intel	O
Core	O
Solo	O
and	O
Intel	O
Core	O
Duo	O
CPUs	O
.	O
</s>
<s>
Because	O
of	O
this	O
,	O
Snow	B-Device
Leopard	I-Device
still	O
remained	O
somewhat	O
popular	O
alongside	O
OS	B-Application
X	I-Application
Lion	I-Application
,	O
despite	O
its	O
lack	O
of	O
continued	O
support	O
,	O
mostly	O
because	O
of	O
its	O
ability	O
to	O
run	O
PowerPC-based	O
applications	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
was	O
also	O
the	O
last	O
release	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
to	O
ship	O
with	O
a	O
welcome	O
video	O
at	O
first	O
boot	O
after	O
installation	O
.	O
</s>
<s>
Reception	O
of	O
Snow	B-Device
Leopard	I-Device
was	O
positive	O
;	O
see	O
the	O
section	O
below	O
.	O
</s>
<s>
Apple	O
states	O
the	O
following	O
basic	O
Snow	B-Device
Leopard	I-Device
system	O
requirements	O
are	O
:	O
</s>
<s>
Mac	O
computer	O
with	O
an	O
Intel	O
processor	O
(	O
IA-32	B-Device
)	O
.	O
</s>
<s>
"	O
Yonah	B-Device
"	O
processors	O
such	O
as	O
Core	O
Solo	O
and	O
Core	O
Duo	O
can	O
run	O
only	O
32-bit	O
applications	O
;	O
later	O
x86-64	B-Device
architecture	B-General_Concept
processors	O
such	O
as	O
Core	O
2	O
Duo	O
,	O
Core	O
i5	O
and	O
i7	O
are	O
also	O
able	O
to	O
run	O
64-bit	B-Device
applications	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
releases	O
do	O
not	O
support	O
PowerPC-based	O
Macs	O
(	O
e.g.	O
,	O
Power	B-Device
Macs	I-Device
,	O
PowerBooks	B-Device
,	O
iBooks	B-Device
,	O
iMacs	B-Device
(	O
G3-G5	O
)	O
,	O
all	O
eMacs	B-Device
,	O
plus	O
pre-February	O
2006	O
Mac	O
Minis	O
and	O
the	O
Power	B-Device
Mac	I-Device
G4	I-Device
Cube	I-Device
)	O
,	O
although	O
PowerPC	B-Architecture
applications	O
are	O
supported	O
via	O
Rosetta	B-Operating_System
,	O
which	O
is	O
now	O
an	O
optional	O
install	O
.	O
</s>
<s>
In	O
2020	O
,	O
two	O
developer	O
previews	B-Language
of	O
Snow	B-Device
Leopard	I-Device
that	O
are	O
universal	O
appeared	O
on	O
the	O
Internet	O
that	O
can	O
be	O
booted	O
on	O
select	O
G4	O
and	O
G5	O
Power	B-Device
Macs	I-Device
with	O
modification	O
and	O
patching	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
is	O
available	O
as	O
an	O
upgrade	O
for	O
Intel-based	O
Macintosh	B-Device
computers	O
.	O
</s>
<s>
The	O
standalone	O
retail	O
version	O
of	O
Snow	B-Device
Leopard	I-Device
is	O
marketed	O
as	O
being	O
restricted	O
to	O
users	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
,	O
while	O
the	O
recommended	O
upgrade	O
path	O
from	O
Apple	O
for	O
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
is	O
through	O
the	O
"	O
Mac	B-Operating_System
Box	I-Operating_System
Set	I-Operating_System
"	O
,	O
which	O
includes	O
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
and	O
the	O
current	O
versions	O
of	O
iLife	B-Application
and	O
iWork	B-Application
.	O
</s>
<s>
These	O
licenses	O
differ	O
in	O
their	O
requirements	O
for	O
pre-installed	O
versions	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
:	O
</s>
<s>
Leopard	B-Application
Upgrade	O
:	O
requires	O
that	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
already	O
be	O
installed	O
.	O
</s>
<s>
If	O
you	O
have	O
purchased	O
an	O
Upgrade	O
for	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
license	O
,	O
then	O
subject	O
to	O
the	O
terms	O
and	O
conditions	O
of	O
this	O
License	O
,	O
you	O
are	O
granted	O
a	O
limited	O
non-exclusive	O
license	O
to	O
install	O
,	O
use	O
and	O
run	O
one	O
(	O
1	O
)	O
copy	O
of	O
the	O
Apple	O
Software	O
on	O
a	O
single	O
Apple-branded	O
computer	O
as	O
long	O
as	O
that	O
computer	O
has	O
a	O
properly	O
licensed	O
copy	O
of	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
already	O
installed	O
on	O
it	O
.	O
</s>
<s>
A	O
"	O
Family	O
Pack	O
Upgrade	O
for	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
"	O
license	O
is	O
also	O
mentioned	O
as	O
a	O
subset	O
of	O
the	O
Leopard	B-Application
Upgrade	O
.	O
</s>
<s>
Single	O
Use	O
:	O
places	O
no	O
restriction	O
on	O
which	O
(	O
if	O
any	O
)	O
version	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
should	O
already	O
be	O
installed	O
.	O
</s>
<s>
Used	O
for	O
the	O
non-upgrade	O
and	O
Mac	B-Operating_System
Box	I-Operating_System
Set	I-Operating_System
versions	O
of	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
It	O
is	O
not	O
entirely	O
clear	O
which	O
license	O
is	O
offered	O
with	O
the	O
retail	O
version	O
of	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
As	O
noted	O
above	O
,	O
Apple	O
's	O
website	O
advertised	O
this	O
version	O
as	O
an	O
"	O
upgrade	O
from	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
for	O
$29	O
"	O
and	O
suggest	O
that	O
others	O
upgrade	O
using	O
the	O
Mac	B-Operating_System
Box	I-Operating_System
Set	I-Operating_System
,	O
implying	O
the	O
stand-alone	O
retail	O
version	O
to	O
be	O
a	O
"	O
Leopard	B-Application
Upgrade	O
"	O
license	O
.	O
</s>
<s>
However	O
,	O
even	O
if	O
the	O
retail	O
edition	O
of	O
Snow	B-Device
Leopard	I-Device
is	O
in	O
fact	O
a	O
"	O
Leopard	B-Application
Upgrade	O
"	O
,	O
the	O
company	O
has	O
acknowledged	O
that	O
there	O
is	O
no	O
technical	O
barrier	O
in	O
that	O
edition	O
preventing	O
a	O
direct	O
upgrade	O
from	O
Mac	B-Application
OS	I-Application
X	I-Application
"	I-Application
Tiger	I-Application
"	I-Application
.	O
</s>
<s>
The	O
Leopard	B-Application
Upgrade	O
license	O
explicitly	O
applies	O
to	O
the	O
Up-To-Date	O
Program	O
(	O
US	O
$9.95	O
)	O
for	O
Macs	O
bought	O
between	O
June	O
8	O
and	O
December	O
26	O
,	O
2009	O
and	O
the	O
installation	O
discs	O
provided	O
through	O
this	O
program	O
are	O
clearly	O
marked	O
as	O
upgrades	O
unlike	O
either	O
of	O
the	O
retail	O
editions	O
.	O
</s>
<s>
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
is	O
intended	O
to	O
be	O
a	O
release	O
aimed	O
to	O
refine	O
the	O
existing	O
feature	O
set	O
,	O
expand	O
the	O
technological	O
capabilities	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
,	O
and	O
improve	O
application	O
efficiency	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
Finder	B-Application
application	O
was	O
completely	O
rewritten	O
in	O
the	O
Cocoa	B-Operating_System
application	I-Operating_System
programming	I-Operating_System
interface	I-Operating_System
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
includes	O
the	O
following	O
changes	O
:	O
</s>
<s>
Mac	B-Application
App	I-Application
Store	I-Application
–	O
An	O
app	B-Application
marketplace	I-Application
built	O
in	O
the	O
image	O
of	O
the	O
iOS	O
App	B-Application
Store	I-Application
.	O
</s>
<s>
Released	O
in	O
version	O
10.6.6	O
.	O
</s>
<s>
Boot	B-Application
Camp	I-Application
now	O
allows	O
Windows	B-Application
partitions	O
to	O
read	O
and	O
copy	O
files	O
from	O
HFS+	B-Application
partitions	O
.	O
</s>
<s>
The	O
Finder	B-Application
has	O
been	O
completely	O
rewritten	O
in	O
Cocoa	B-Operating_System
to	O
take	O
advantage	O
of	O
the	O
new	O
technologies	O
introduced	O
in	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
A	O
much	O
smaller	O
OS	O
footprint	O
,	O
taking	O
up	O
about	O
7GB	O
less	O
space	O
than	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
.	O
</s>
<s>
iChat	B-Protocol
enhancements	O
include	O
greater	O
resolution	O
video	O
chats	O
in	O
iChat	B-Protocol
Theater	O
and	O
lowered	O
upload	O
bandwidth	O
requirements	O
.	O
</s>
<s>
Microsoft	B-Operating_System
Exchange	I-Operating_System
support	O
is	O
now	O
integrated	O
into	O
the	O
Mail	B-Operating_System
,	O
Address	B-Operating_System
Book	I-Operating_System
,	O
and	O
iCal	B-Language
applications	O
.	O
</s>
<s>
However	O
,	O
only	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
2007	I-Operating_System
is	O
supported	O
and	O
customers	O
using	O
prior	O
versions	O
of	O
Exchange	B-Operating_System
must	O
either	O
upgrade	O
or	O
use	O
Microsoft	B-Application
Entourage	I-Application
.	O
</s>
<s>
Full	O
multi-touch	B-Application
trackpad	O
support	O
has	O
been	O
added	O
to	O
notebooks	O
prior	O
to	O
those	O
introduced	O
in	O
October	O
2008	O
.	O
</s>
<s>
While	O
the	O
original	O
MacBook	B-Device
Air	I-Device
and	O
other	O
early	O
multi-touch	B-Application
trackpad	O
enabled	O
notebooks	O
had	O
support	O
for	O
some	O
gestures	O
,	O
they	O
were	O
unable	O
to	O
use	O
four-finger	O
gestures	O
.	O
</s>
<s>
This	O
limitation	O
has	O
now	O
been	O
removed	O
in	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
Preview	B-Language
can	O
infer	O
the	O
structure	O
of	O
a	O
paragraph	O
in	O
a	O
PDF	B-Application
document	O
.	O
</s>
<s>
QuickTime	B-Application
X	I-Application
(	O
version	O
10	O
)	O
,	O
the	O
next	O
release	O
of	O
QuickTime	B-Application
player	I-Application
and	O
multimedia	O
framework	O
,	O
has	O
been	O
completely	O
rewritten	O
into	O
a	O
full	O
64-bit	B-Device
Cocoa	B-Operating_System
application	O
and	O
builds	O
on	O
the	O
media	O
technologies	O
in	O
Mac	B-Device
OS	I-Device
X	I-Device
,	O
such	O
as	O
Core	B-Operating_System
Audio	I-Operating_System
,	O
Core	B-Operating_System
Video	I-Operating_System
,	O
and	O
Core	B-Operating_System
Animation	I-Operating_System
,	O
to	O
deliver	O
playback	O
.	O
</s>
<s>
Apple	O
has	O
redesigned	O
the	O
QuickTime	B-Application
user	O
interface	O
to	O
resemble	O
the	O
full-screen	O
QuickTime	B-Application
view	O
in	O
prior	O
versions	O
,	O
where	O
the	O
entire	O
window	O
displays	O
the	O
video	O
.	O
</s>
<s>
QuickTime	B-Application
X	I-Application
also	O
supports	O
HTTP	B-General_Concept
live	I-General_Concept
streaming	I-General_Concept
and	O
takes	O
advantage	O
of	O
ColorSync	O
to	O
provide	O
high-quality	O
color	O
reproduction	O
.	O
</s>
<s>
If	O
Snow	B-Device
Leopard	I-Device
is	O
installed	O
on	O
a	O
Mac	O
with	O
an	O
nVidia	B-Application
GeForce	I-Application
9400M	O
,	O
320M	O
or	O
GT	O
330M	O
graphics	B-Device
card	I-Device
,	O
QuickTime	B-Application
X	I-Application
will	O
be	O
able	O
to	O
use	O
its	O
video-decoding	O
capabilities	O
to	O
reduce	O
CPU	B-General_Concept
load	O
.	O
</s>
<s>
Safari	B-Operating_System
4	I-Operating_System
features	O
Top	O
Sites	O
,	O
Cover	O
Flow	O
,	O
VoiceOver	B-Operating_System
,	O
expanded	O
standards	O
support	O
,	O
and	O
built-in	O
crash	O
resistance	O
,	O
which	O
prevents	O
browser	O
crashes	O
caused	O
by	O
plug-ins	O
by	O
running	O
them	O
in	O
separate	O
processes	O
.	O
</s>
<s>
Safari	B-Operating_System
4	I-Operating_System
is	O
bundled	O
with	O
Snow	B-Device
Leopard	I-Device
but	O
does	O
not	O
require	O
it	O
,	O
as	O
it	O
is	O
available	O
for	O
free	O
for	O
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
and	O
Leopard	B-Application
as	O
well	O
as	O
Windows	B-Application
.	O
</s>
<s>
Time	B-Operating_System
Machine	I-Operating_System
connection	O
establishment	O
and	O
backups	O
are	O
now	O
much	O
faster	O
.	O
</s>
<s>
VoiceOver	B-Operating_System
has	O
also	O
been	O
greatly	O
enhanced	O
in	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
On	O
newer	O
Apple	O
portables	O
,	O
trackpad	O
gestures	O
can	O
be	O
used	O
to	O
control	O
VoiceOver	B-Operating_System
functions	O
,	O
including	O
the	O
"	O
rotor	O
"	O
gesture	O
first	O
seen	O
in	O
VoiceOver	B-Operating_System
for	O
the	O
iPhone	B-Device
3GS	I-Device
,	O
allowing	O
for	O
the	O
changing	O
of	O
certain	O
VoiceOver	B-Operating_System
navigation	O
options	O
by	O
rotating	O
fingers	O
on	O
the	O
trackpad	O
.	O
</s>
<s>
Braille	O
Display	O
support	O
is	O
also	O
improved	O
,	O
with	O
Bluetooth	B-Protocol
displays	O
supported	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
While	O
the	O
Finder	B-Application
was	O
completely	O
rewritten	O
in	O
Cocoa	B-Operating_System
,	O
it	O
did	O
not	O
receive	O
a	O
major	O
user	O
interface	O
overhaul	O
.	O
</s>
<s>
The	O
"	O
traffic	O
light	O
"	O
titlebar	O
controls	O
are	O
now	O
slightly	O
lighter	O
in	O
appearance	O
and	O
have	O
less	O
depth	O
than	O
they	O
did	O
in	O
Mac	B-Application
OS	I-Application
X	I-Application
10.5	I-Application
.	O
</s>
<s>
Exposé	O
can	O
now	O
display	O
windows	B-Application
for	O
a	O
single	O
program	O
by	O
left	O
clicking	O
and	O
holding	O
its	O
icon	O
in	O
the	O
dock	O
.	O
</s>
<s>
Windows	B-Application
are	O
arranged	O
in	O
a	O
new	O
grid	O
pattern	O
.	O
</s>
<s>
An	O
option	O
has	O
been	O
added	O
to	O
the	O
Finder	B-Application
preferences	O
that	O
allows	O
the	O
user	O
to	O
modify	O
search	O
behavior	O
.	O
</s>
<s>
Dock	O
Stacks	O
,	O
when	O
viewed	O
as	O
a	O
grid	O
,	O
allow	O
viewing	O
of	O
a	O
subfolder	O
as	O
a	O
new	O
stack	O
,	O
rather	O
than	O
launching	O
a	O
Finder	B-Application
window	O
,	O
in	O
a	O
manner	O
similar	O
to	O
"	O
tunnelling	O
"	O
.	O
</s>
<s>
When	O
viewed	O
as	O
grids	O
or	O
lists	O
,	O
scroll-bars	O
are	O
provided	O
to	O
navigate	O
folders	O
with	O
more	O
items	O
than	O
the	O
current	O
screen	O
resolution	O
will	O
accommodate	O
,	O
as	O
the	O
program	O
does	O
not	O
scale	O
the	O
icons	O
to	O
show	O
as	O
many	O
as	O
possible	O
the	O
way	O
it	O
did	O
in	O
OS	B-Application
X	I-Application
10.5	I-Application
.	O
</s>
<s>
Windows	B-Application
can	O
now	O
be	O
minimized	O
directly	O
onto	O
their	O
application	O
's	O
icon	O
in	O
the	O
dock	O
.	O
</s>
<s>
Faster	O
PDF	B-Application
and	O
JPEG	O
icon	O
refreshes	O
.	O
</s>
<s>
Prefixes	O
for	O
bytes	B-Application
are	O
now	O
used	O
in	O
strictly	O
decimal	O
meaning	O
(	O
as	O
opposed	O
to	O
their	O
binary	O
meaning	O
)	O
when	O
describing	O
disk	O
space	O
,	O
such	O
that	O
an	O
indicated	O
file	O
size	O
of	O
1MB	O
corresponds	O
to	O
1	O
million	O
bytes	B-Application
,	O
as	O
commonly	O
used	O
by	O
hard	O
disk	O
manufacturers	O
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
shuts	O
down	O
and	O
goes	O
to	O
sleep	O
faster	O
.	O
</s>
<s>
As	O
with	O
most	O
upgrades	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
,	O
new	O
wallpapers	O
are	O
available	O
.	O
</s>
<s>
There	O
are	O
new	O
wallpapers	O
in	O
the	O
Nature	O
(	O
two	O
of	O
which	O
are	O
of	O
snow	B-Device
leopards	I-Device
)	O
,	O
Plants	O
and	O
Black	O
and	O
White	O
sub-folders	O
under	O
the	O
Apple	O
folder	O
.	O
</s>
<s>
AppleTalk	B-Application
,	O
a	O
network	B-Protocol
protocol	I-Protocol
suite	I-Protocol
that	O
was	O
introduced	O
in	O
1985	O
,	O
is	O
no	O
longer	O
supported	O
.	O
</s>
<s>
Apple	B-Protocol
Filing	I-Protocol
Protocol	I-Protocol
over	O
TCP/IP	O
is	O
still	O
supported	O
in	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
It	O
is	O
no	O
longer	O
possible	O
to	O
change	O
an	O
application	O
's	O
language	O
using	O
the	O
Finder	B-Application
's	O
"	O
Get	O
Info	O
"	O
dialogue	O
.	O
</s>
<s>
The	O
option	O
to	O
change	O
language	O
for	O
individual	O
apps	O
was	O
added	O
back	O
in	O
macOS	B-Device
Catalina	I-Device
in	O
2019	O
.	O
</s>
<s>
Creator	B-Operating_System
codes	I-Operating_System
,	O
which	O
are	O
per-file	O
metadata	O
attributes	O
that	O
define	O
,	O
for	O
a	O
file	O
that	O
has	O
a	O
creator	B-Operating_System
code	I-Operating_System
,	O
what	O
application	O
should	O
open	O
that	O
file	O
,	O
regardless	O
of	O
its	O
extension	O
,	O
have	O
had	O
their	O
priority	O
in	O
the	O
application	O
selection	O
process	O
reduced	O
.	O
</s>
<s>
Creating	O
or	O
updating	O
Hierarchical	B-Application
File	I-Application
System	I-Application
(	O
HFS	B-Application
Plus	I-Application
predecessor	O
)	O
volumes	O
is	O
no	O
longer	O
supported	O
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
X	I-Application
Tiger	I-Application
added	O
limited	O
support	O
for	O
64-bit	B-Device
applications	O
on	O
machines	O
with	O
64-bit	B-Device
processors	I-Device
;	O
Leopard	B-Application
extended	O
the	O
support	O
for	O
64-bit	B-Device
applications	O
to	O
include	O
applications	O
using	O
most	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
's	O
libraries	O
and	O
frameworks	O
.	O
</s>
<s>
In	O
Snow	B-Device
Leopard	I-Device
,	O
most	O
built-in	O
applications	O
have	O
been	O
rebuilt	O
to	O
use	O
the	O
64-bit	O
x86-64	O
architecture	B-General_Concept
(	O
excluding	O
iTunes	B-Operating_System
,	O
Front	B-Operating_System
Row	I-Operating_System
,	O
Grapher	B-Application
and	O
DVD	O
Player	O
applications	O
)	O
.	O
</s>
<s>
They	O
will	O
run	O
in	O
32-bit	O
mode	O
on	O
machines	O
with	O
32-bit	O
processors	O
,	O
and	O
in	O
64-bit	B-Device
mode	O
on	O
machines	O
with	O
64-bit	B-Device
processors	I-Device
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
Mac	B-Device
OS	I-Device
X	I-Device
kernel	B-Operating_System
has	O
been	O
rebuilt	O
to	O
run	O
in	O
64-bit	B-Device
mode	O
on	O
some	O
machines	O
.	O
</s>
<s>
On	O
those	O
machines	O
,	O
Snow	B-Device
Leopard	I-Device
supports	O
up	O
to	O
16	O
terabytes	O
of	O
RAM	B-Architecture
.	O
</s>
<s>
Newer	O
Xserve	B-Device
and	O
Mac	B-Device
Pro	I-Device
machines	O
will	O
run	O
a	O
64-bit	B-Device
kernel	B-Operating_System
by	O
default	O
;	O
newer	O
iMac	B-Device
and	O
MacBook	B-Device
Pro	I-Device
machines	O
can	O
run	O
a	O
64-bit	B-Device
kernel	B-Operating_System
,	O
but	O
will	O
not	O
do	O
so	O
by	O
default	O
.	O
</s>
<s>
Users	O
wishing	O
to	O
use	O
the	O
64-bit	B-Device
kernel	B-Operating_System
on	O
those	O
machines	O
must	O
hold	O
down	O
the	O
numbers	O
6	O
and	O
4	O
on	O
the	O
keyboard	O
while	O
booting	O
to	O
get	O
the	O
64-bit	B-Device
kernel	B-Operating_System
to	O
load	O
.	O
</s>
<s>
A	O
change	O
to	O
the	O
com.apple.Boot.plist	O
will	O
also	O
enable	O
users	O
with	O
compatible	O
computers	O
to	O
permanently	O
boot	O
into	O
64-bit	B-Device
for	O
those	O
wishing	O
to	O
do	O
so	O
.	O
</s>
<s>
Stuart	O
Harris	O
,	O
software	O
product	O
marketing	O
manager	O
at	O
Apple	O
Australia	O
,	O
said	O
,	O
"	O
For	O
the	O
most	O
part	O
,	O
everything	O
that	O
they	O
experience	O
on	O
the	O
Mac	O
,	O
from	O
the	O
64-bit	B-Device
point	O
of	O
view	O
,	O
the	O
applications	O
,	O
the	O
operating	B-General_Concept
system	I-General_Concept
,	O
is	O
all	O
going	O
to	O
be	O
64-bit	B-Device
,	O
but	O
that	O
at	O
this	O
stage	O
there	O
were	O
very	O
few	O
things	O
,	O
such	O
as	O
device	O
drivers	O
,	O
that	O
required	O
64-bit	B-Device
mode	O
at	O
the	O
kernel	B-Operating_System
level	O
"	O
.	O
</s>
<s>
With	O
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
only	O
the	O
following	O
Apple	O
computers	O
run	O
or	O
are	O
capable	O
of	O
running	O
the	O
64-bit	B-Device
kernel	B-Operating_System
:	O
</s>
<s>
Amit	O
Singh	O
has	O
reported	O
that	O
the	O
early	O
2009	O
Mac	O
Mini	O
and	O
MacBook	O
may	O
be	O
capable	O
of	O
running	O
the	O
64-bit	B-Device
kernel	B-Operating_System
;	O
however	O
,	O
Apple	O
has	O
set	O
these	O
models	O
to	O
boot	O
into	O
the	O
32-bit	O
kernel	B-Operating_System
.	O
</s>
<s>
With	O
some	O
tweaking	O
,	O
the	O
Unibody	O
MacBook	O
can	O
be	O
set	O
to	O
boot	O
the	O
64-bit	B-Device
kernel	B-Operating_System
.	O
</s>
<s>
Grand	B-Operating_System
Central	I-Operating_System
Dispatch	I-Operating_System
(	O
GCD	O
)	O
uses	O
the	O
multiple	O
processor	O
cores	O
now	O
in	O
every	O
new	O
Macintosh	B-Device
for	O
more	O
efficient	O
performance	O
.	O
</s>
<s>
Due	O
to	O
the	O
complexity	O
of	O
multithreaded	B-Operating_System
programming	I-Operating_System
and	O
technical	O
difficulties	O
traditionally	O
involved	O
in	O
making	O
applications	O
optimized	O
for	O
multicore	O
CPUs	O
,	O
the	O
majority	O
of	O
computer	O
applications	O
do	O
not	O
effectively	O
use	O
multiple	O
processor	O
cores	O
.	O
</s>
<s>
Grand	B-Operating_System
Central	I-Operating_System
Dispatch	I-Operating_System
includes	O
APIs	B-Application
to	O
help	O
programmers	O
efficiently	O
use	O
these	O
cores	O
for	O
parallel	O
programming	O
.	O
</s>
<s>
Grand	B-Operating_System
Central	I-Operating_System
Dispatch	I-Operating_System
abstracts	O
the	O
notion	O
of	O
threads	B-Operating_System
away	O
,	O
and	O
instead	O
provides	O
developers	O
with	O
the	O
concept	O
of	O
queues	O
—	O
lists	O
of	O
jobs	O
(	O
blocks	B-Language
of	O
code	O
)	O
that	O
need	O
to	O
be	O
executed	O
.	O
</s>
<s>
GCD	O
takes	O
the	O
responsibility	O
of	O
distributing	O
the	O
jobs	O
among	O
actual	O
threads	B-Operating_System
and	O
cores	O
,	O
and	O
clearing	O
up	O
unused	O
memory	O
created	O
by	O
inactive	O
or	O
old	O
threads	B-Operating_System
to	O
achieve	O
maximum	O
performance	O
.	O
</s>
<s>
Apple	O
is	O
also	O
releasing	O
APIs	B-Application
for	O
Grand	B-Operating_System
Central	I-Operating_System
Dispatch	I-Operating_System
for	O
developers	O
to	O
use	O
in	O
their	O
applications	O
and	O
also	O
to	O
analyze	O
specific	O
blocks	B-Language
of	O
code	O
running	O
on	O
Grand	B-Operating_System
Central	I-Operating_System
Dispatch	I-Operating_System
.	O
</s>
<s>
A	O
new	O
C	B-Language
and	O
Objective-C	B-Language
language	O
feature	O
named	O
"	O
Blocks	B-Language
"	O
facilitates	O
creation	O
of	O
code	O
that	O
will	O
easily	O
optimize	O
to	O
take	O
advantage	O
of	O
Grand	B-Operating_System
Central	I-Operating_System
Dispatch	I-Operating_System
.	O
</s>
<s>
OpenCL	B-Application
(	O
Open	B-Application
Computing	I-Application
Language	I-Application
)	O
addresses	O
the	O
power	O
of	O
graphics	B-Architecture
processing	I-Architecture
units	I-Architecture
(	O
GPUs	B-Architecture
)	O
to	O
leverage	O
them	O
in	O
any	O
application	O
,	O
and	O
not	O
just	O
for	O
graphics-intensive	O
applications	O
like	O
3D	O
games	O
.	O
</s>
<s>
OpenCL	B-Application
automatically	O
optimizes	O
for	O
the	O
kind	O
of	O
graphics	B-Architecture
processor	I-Architecture
in	O
the	O
Mac	O
,	O
adjusting	O
itself	O
to	O
the	O
available	O
processing	O
power	O
.	O
</s>
<s>
OpenCL	B-Application
provides	O
consistent	O
numeric	O
precision	O
and	O
accuracy	O
,	O
fixing	O
a	O
problem	O
that	O
has	O
hampered	O
GPU-based	O
programming	O
in	O
the	O
past	O
.	O
</s>
<s>
OpenCL	B-Application
includes	O
a	O
C-based	O
programming	O
language	O
with	O
a	O
structure	O
that	O
is	O
already	O
familiar	O
to	O
Mac	B-Device
OS	I-Device
X	I-Device
programmers	O
,	O
who	O
can	O
use	O
Xcode	B-Operating_System
developer	O
tools	O
to	O
adapt	O
their	O
programs	O
to	O
work	O
with	O
OpenCL	B-Application
.	O
</s>
<s>
Only	O
the	O
most	O
process	O
intensive	O
parts	O
of	O
the	O
application	O
need	O
to	O
be	O
written	O
in	O
OpenCL	B-Application
C	B-Language
without	O
affecting	O
the	O
rest	O
of	O
the	O
code	O
.	O
</s>
<s>
OpenCL	B-Application
is	O
an	O
open	O
standard	O
that	O
has	O
been	O
supported	O
by	O
AMD	O
,	O
Intel	O
,	O
and	O
Nvidia	O
;	O
it	O
is	O
maintained	O
by	O
Khronos	B-Library
Group	I-Library
.	O
</s>
<s>
It	O
serves	O
a	O
similar	O
purpose	O
to	O
Nvidia	O
's	O
C	B-Language
for	O
CUDA	B-Architecture
and	O
Microsoft	O
's	O
Direct3D	O
11	O
compute	O
shaders	O
.	O
</s>
<s>
It	O
only	O
works	O
with	O
the	O
following	O
Mac	O
GPUs	B-Architecture
:	O
NVIDIA	B-Application
GeForce	I-Application
320M	O
,	O
GT	O
330M	O
,	O
9400M	O
,	O
9600M	O
GT	O
,	O
8600M	O
GT	O
,	O
GT	O
120	O
,	O
GT	O
130	O
,	O
GTX	O
285	O
,	O
8800	O
GT	O
,	O
8800	O
GS	O
,	O
Quadro	O
FX	O
4800	O
,	O
FX	O
5600	O
and	O
ATI	O
Radeon	O
HD	O
4670	O
,	O
HD	O
4850	O
,	O
HD	O
4870	O
,	O
HD	O
5670	O
,	O
HD	O
5750	O
,	O
HD	O
5770	O
,	O
HD	O
5870	O
,	O
HD	O
6490M	O
,	O
HD	O
6750M	O
,	O
HD	O
6770M	O
,	O
HD	O
6970M	O
.	O
</s>
<s>
If	O
the	O
system	O
does	O
not	O
possess	O
one	O
of	O
these	O
compatible	O
GPUs	B-Architecture
,	O
OpenCL	B-Application
code	O
will	O
instead	O
execute	O
on	O
the	O
system	O
's	O
CPU	B-General_Concept
.	O
</s>
<s>
CUPS	B-Application
(	O
the	O
printing	O
system	O
used	O
in	O
many	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
)	O
has	O
been	O
updated	O
to	O
version	O
1.4	O
which	O
provides	O
improved	O
driver	O
,	O
networking	O
,	O
and	O
Kerberos	B-Protocol
support	O
along	O
with	O
performance	O
improvements	O
.	O
</s>
<s>
CUPS	B-Application
1.4	O
is	O
also	O
the	O
first	O
implementation	O
of	O
the	O
Internet	B-Protocol
Printing	I-Protocol
Protocol	I-Protocol
version2.1	O
.	O
</s>
<s>
Power	O
management	O
has	O
been	O
improved	O
,	O
with	O
implementation	O
of	O
a	O
new	O
wake	B-Protocol
on	I-Protocol
demand	I-Protocol
feature	O
supported	O
on	O
more	O
recent	O
Macintosh	B-Device
hardware	O
.	O
</s>
<s>
Wake	B-Protocol
on	I-Protocol
demand	I-Protocol
takes	O
advantage	O
of	O
the	O
sleep	B-Protocol
proxy	I-Protocol
service	I-Protocol
implemented	O
in	O
AirPort	O
and	O
Time	B-Device
Capsule	I-Device
routers	O
,	O
so	O
that	O
the	O
computer	O
can	O
sleep	O
while	O
the	O
router	O
responds	O
to	O
mDNS	B-Protocol
queries	O
.	O
</s>
<s>
Apple	O
strengthened	O
Mac	B-Device
OS	I-Device
X	I-Device
by	O
implementing	O
stack	B-Error_Name
protection	I-Error_Name
,	O
and	O
sandboxing	O
more	O
Mac	B-Device
OS	I-Device
X	I-Device
components	O
such	O
as	O
the	O
H.264	B-Application
decoder	B-General_Concept
in	O
QuickTime	B-Application
and	O
browser	O
plug-ins	O
as	O
a	O
separate	O
process	O
in	O
Safari	B-Application
.	O
</s>
<s>
Secure	O
virtual	O
memory	O
was	O
an	O
option	O
in	O
earlier	O
releases	O
on	O
Snow	B-Device
Leopard	I-Device
,	O
but	O
the	O
checkbox	O
to	O
disable	O
it	O
was	O
removed	O
later	O
.	O
</s>
<s>
Computer	O
security	O
researcher	O
Charlie	O
Miller	O
claims	O
that	O
OS	B-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
is	O
more	O
vulnerable	O
to	O
attack	O
than	O
Microsoft	B-Application
Windows	I-Application
for	O
lacking	O
full	O
address	O
space	O
layout	O
randomization	O
(	O
ASLR	O
)	O
since	O
Mac	B-Application
OS	I-Application
X	I-Application
Leopard	I-Application
,	O
a	O
technology	O
that	O
Microsoft	O
started	O
implementing	O
in	O
Windows	B-Application
Vista	I-Application
.	O
</s>
<s>
The	O
Safari	B-Application
web	I-Application
browser	I-Application
has	O
received	O
updates	O
to	O
version	O
6.0	O
in	O
Lion	B-Application
and	O
Mountain	O
Lion	B-Application
,	O
but	O
not	O
in	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
Snow	B-Device
Leopard	I-Device
breaks	O
compatibility	O
with	O
several	O
older	O
versions	O
of	O
some	O
applications	O
,	O
such	O
as	O
Parallels	B-Language
Desktop	I-Language
3.0	O
,	O
versions	O
of	O
Aperture	B-Operating_System
before	O
2.1.1	O
,	O
and	O
versions	O
of	O
Keynote	B-Protocol
before	O
2.0.2	O
,	O
among	O
other	O
software	O
.	O
</s>
<s>
Apple	O
has	O
also	O
published	O
a	O
list	O
of	O
applications	O
with	O
known	O
compatibility	O
issues	O
with	O
Snow	B-Device
Leopard	I-Device
.	O
</s>
<s>
Printer	O
and	O
scanner	O
drivers	O
used	O
by	O
previous	O
versions	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
are	O
not	O
compatible	O
with	O
Snow	B-Device
Leopard	I-Device
and	O
will	O
be	O
replaced	O
during	O
Snow	B-Device
Leopard	I-Device
installation	O
.	O
</s>
<s>
Since	O
the	O
initial	O
release	O
of	O
Snow	B-Device
Leopard	I-Device
many	O
manufacturers	O
have	O
provided	O
compatible	O
drivers	O
that	O
are	O
available	O
via	O
Software	O
Update	O
.	O
</s>
<s>
If	O
a	O
native	O
driver	O
is	O
not	O
available	O
Snow	B-Device
Leopard	I-Device
also	O
includes	O
CUPS	B-Application
and	O
Gutenprint	B-Application
open	B-Application
source	I-Application
drivers	O
that	O
may	O
provide	O
limited	O
functionality	O
.	O
</s>
<s>
10.6.0	O
introduced	O
a	O
bug	O
that	O
frequently	O
prevented	O
DNS	B-Protocol
queries	I-Protocol
from	O
returning	O
IPv6	B-Protocol
addresses	I-Protocol
.	O
</s>
<s>
This	O
was	O
resolved	O
in	O
10.6.8	O
.	O
</s>
<s>
At	O
the	O
WWDC	O
in	O
2009	O
,	O
Apple	O
stated	O
that	O
Snow	B-Device
Leopard	I-Device
features	O
no	O
new	O
major	O
visual	O
changes	O
.	O
</s>
<s>
Instead	O
,	O
the	O
release	O
focuses	O
on	O
refining	O
the	O
operating	B-General_Concept
system	I-General_Concept
to	O
enable	O
better	O
performance	O
.	O
</s>
<s>
OSNews	O
reported	O
that	O
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
was	O
well	O
received	O
by	O
critics	O
.	O
</s>
<s>
Engadget	O
reviewed	O
Snow	B-Device
Leopard	I-Device
and	O
pointed	O
out	O
that	O
the	O
price	O
of	O
Snow	B-Device
Leopard	I-Device
dropped	O
from	O
the	O
$129	O
Apple	O
charged	O
for	O
previous	O
versions	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
to	O
$29	O
.	O
</s>
<s>
However	O
,	O
most	O
reviews	O
commented	O
on	O
the	O
large	O
improvement	O
in	O
speed	O
of	O
the	O
native	O
Mac	B-Device
OS	I-Device
X	I-Device
applications	O
Finder	B-Application
,	O
iCal	B-Language
,	O
Mail	B-Operating_System
,	O
etc	O
.	O
</s>
<s>
CNET	O
editors	O
gave	O
it	O
4	O
stars	O
out	O
of	O
5	O
,	O
stating	O
"	O
Intel	B-Device
Mac	I-Device
users	O
will	O
like	O
Snow	B-Device
Leopard	I-Device
's	O
smartly	O
designed	O
interface	O
enhancements	O
,	O
and	O
its	O
Exchange	B-Operating_System
support	O
is	O
a	O
must-have	O
(	O
especially	O
with	O
Outlook	B-Application
for	O
Mac	O
on	O
the	O
way	O
)	O
.	O
</s>
<s>
With	O
a	O
ton	O
of	O
technological	O
improvements	O
,	O
Snow	B-Device
Leopard	I-Device
is	O
worth	O
the	O
$29	O
upgrade	O
fee.	O
"	O
</s>
<s>
On	O
October	O
21	O
,	O
2009	O
,	O
SFGate	O
blogger	O
Yobie	O
Benjamin	O
wrote	O
that	O
the	O
"	O
MacBook	B-Device
Pro	I-Device
that	O
came	O
preloaded	O
with	O
Snow	B-Device
Leopard	I-Device
kicks	O
butt	O
and	O
is	O
a	O
screaming	O
fast	O
machine	O
"	O
,	O
but	O
"	O
when	O
I	O
tried	O
to	O
upgrade	O
one	O
of	O
my	O
'	O
older	O
 '	O
MacBooks	O
,	O
it	O
was	O
a	O
fricking	O
disaster	O
from	O
hell	O
"	O
.	O
</s>
<s>
The	O
single-user	O
upgrade	O
and	O
Family	O
Pack	O
units	O
of	O
Snow	B-Device
Leopard	I-Device
ranked	O
1	O
and	O
2	O
respectively	O
on	O
com	O
's	O
software	O
bestseller	O
charts	O
when	O
Apple	O
announced	O
it	O
would	O
release	O
it	O
within	O
the	O
week	O
.	O
</s>
<s>
Testmac.com	O
highlighted	O
other	O
unexpected	O
improvements	O
including	O
the	O
release	O
of	O
a	O
new	O
version	O
of	O
Boot	B-Application
Camp	I-Application
,	O
version	O
3.0	O
,	O
a	O
cleaner	O
,	O
popup	O
software	O
update	O
process	O
and	O
screen	O
and	O
video	O
recording	O
in	O
the	O
new	O
QuickTime	B-Application
Player	I-Application
.	O
</s>
<s>
The	O
BBC	O
reported	O
that	O
a	O
bug	O
in	O
Mac	B-Device
OS	I-Device
X	I-Device
versions	O
10.6.0	O
and	O
10.6.1	O
which	O
,	O
in	O
rare	O
cases	O
,	O
caused	O
loss	O
of	O
user	O
account	O
data	O
after	O
use	O
of	O
a	O
previously	O
existing	O
guest	O
account	O
by	O
users	O
who	O
had	O
upgraded	O
from	O
a	O
previous	O
version	O
of	O
Mac	B-Device
OS	I-Device
X	I-Device
,	O
received	O
wide	O
publicity	O
.	O
</s>
<s>
The	O
bug	O
was	O
fixed	O
as	O
of	O
version	O
10.6.2	O
.	O
</s>
<s>
Former	O
Apple	O
CEO	O
Steve	O
Jobs	O
announced	O
Snow	B-Device
Leopard	I-Device
at	O
WWDC	O
on	O
June	O
9	O
,	O
2008	O
,	O
and	O
it	O
was	O
privately	O
demonstrated	O
to	O
developers	O
by	O
Senior	O
Vice	O
President	O
of	O
Software	O
Engineering	O
Bertrand	O
Serlet	O
.	O
</s>
<s>
On	O
Monday	O
,	O
May	O
11	O
,	O
2009	O
,	O
after	O
build	O
10A354	O
,	O
Apple	O
issued	O
a	O
code	O
freeze	O
on	O
Snow	B-Device
Leopard	I-Device
's	O
APIs	B-Application
.	O
</s>
<s>
The	O
first	O
public	O
demonstration	O
was	O
given	O
at	O
WWDC	O
2009	O
by	O
Serlet	O
and	O
Vice	O
President	O
of	O
Mac	B-Application
OS	I-Application
Engineering	O
,	O
Craig	O
Federighi	O
.	O
</s>
<s>
Mac	B-Device
OS	I-Device
X	I-Device
Server	O
includes	O
these	O
features	O
and	O
other	O
server-related	O
features	O
.	O
</s>
<s>
Apple	O
initially	O
stated	O
that	O
Server	O
would	O
include	O
ZFS	B-Application
support	O
,	O
but	O
mention	O
of	O
this	O
feature	O
later	O
disappeared	O
from	O
Apple	O
's	O
website	O
and	O
it	O
was	O
not	O
included	O
in	O
the	O
final	O
release	O
due	O
to	O
licensing	O
issues	O
.	O
</s>
<s>
On	O
January	O
27	O
,	O
2016	O
,	O
Apple	O
released	O
an	O
update	O
for	O
the	O
Mac	B-Application
App	I-Application
Store	I-Application
on	O
Mac	B-Device
OS	I-Device
X	I-Device
10.6	I-Device
.	O
</s>
<s>
The	O
update	O
was	O
titled	O
"	O
Mac	B-Application
App	I-Application
Store	I-Application
Update	O
for	O
OS	B-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
"	O
.	O
</s>
