<s>
In	O
Apple	O
's	O
macOS	B-Application
operating	O
system	O
,	O
Quartz	B-Operating_System
is	O
the	O
Quartz	B-Operating_System
2D	I-Operating_System
and	O
Quartz	B-Operating_System
Compositor	O
part	O
of	O
the	O
Core	B-Operating_System
Graphics	I-Operating_System
framework	O
.	O
</s>
<s>
Quartz	B-Operating_System
includes	O
both	O
a	O
2D	O
renderer	O
in	O
Core	B-Operating_System
Graphics	I-Operating_System
and	O
the	O
composition	O
engine	O
that	O
sends	O
instructions	O
to	O
the	O
graphics	O
card	O
.	O
</s>
<s>
Because	O
of	O
this	O
vertical	O
nature	O
,	O
Quartz	B-Operating_System
is	O
often	O
synonymous	O
with	O
Core	B-Operating_System
Graphics	I-Operating_System
.	O
</s>
<s>
In	O
a	O
general	O
sense	O
,	O
Quartz	B-Operating_System
or	O
Quartz	B-Operating_System
technologies	O
can	O
refer	O
to	O
almost	O
every	O
part	O
of	O
the	O
graphics	O
model	O
from	O
the	O
rendering	O
layer	O
down	O
to	O
the	O
compositor	O
including	O
Core	O
Image	O
and	O
Core	O
Video	O
.	O
</s>
<s>
Other	O
Apple	O
graphics	O
technologies	O
that	O
use	O
the	O
"	O
Quartz	B-Operating_System
"	O
prefix	O
include	O
these	O
:	O
</s>
<s>
Quartz	B-Operating_System
2D	I-Operating_System
is	O
the	O
primary	O
two-dimensional	O
(	O
2D	O
)	O
text	O
and	O
graphics	O
rendering	O
library	O
:	O
It	O
directly	O
supports	O
Aqua	B-Application
by	O
displaying	O
two-dimensional	O
graphics	O
to	O
create	O
the	O
user	O
interface	O
,	O
including	O
on-the-fly	O
rendering	O
and	O
anti-aliasing	B-Algorithm
.	O
</s>
<s>
Quartz	B-Operating_System
can	O
render	O
text	O
with	O
sub-pixel	O
precision	O
;	O
graphics	O
are	O
limited	O
to	O
more	O
traditional	O
anti-aliasing	B-Algorithm
,	O
which	O
is	O
the	O
default	O
mode	O
of	O
operation	O
but	O
can	O
be	O
turned	O
off	O
.	O
</s>
<s>
In	O
Mac	O
OS	O
X	O
10.4	O
Tiger	O
,	O
Apple	O
introduced	O
Quartz	B-Operating_System
2D	I-Operating_System
Extreme	O
,	O
enabling	O
Quartz	B-Operating_System
2D	I-Operating_System
to	O
offload	O
rendering	O
to	O
compatible	O
GPUs	B-Architecture
.	O
</s>
<s>
However	O
,	O
GPU	B-Architecture
rendering	O
was	O
not	O
enabled	O
by	O
default	O
due	O
to	O
potential	O
video	O
redraw	O
issues	O
or	O
kernel	B-Operating_System
panics	I-Operating_System
.	O
</s>
<s>
In	O
Mac	O
OS	O
X	O
v10.5	O
Quartz	B-Operating_System
2D	I-Operating_System
Extreme	O
was	O
renamed	O
to	O
QuartzGL	O
.	O
</s>
<s>
The	O
Quartz	B-Operating_System
Compositor	O
is	O
the	O
compositing	O
engine	O
used	O
by	O
macOS	B-Application
.	O
</s>
<s>
In	O
Mac	O
OS	O
X	O
Jaguar	O
and	O
later	O
,	O
the	O
Quartz	B-Operating_System
Compositor	O
can	O
use	O
the	O
graphics	B-Architecture
accelerator	I-Architecture
(	O
GPU	B-Architecture
)	O
to	O
vastly	O
improve	O
composition	O
performance	O
.	O
</s>
<s>
This	O
technology	O
is	O
known	O
as	O
Quartz	B-Operating_System
Extreme	O
and	O
is	O
enabled	O
automatically	O
on	O
systems	O
with	O
supported	O
graphics	O
cards	O
.	O
</s>
<s>
It	O
is	O
widely	O
stated	O
that	O
Quartz	B-Operating_System
"	O
uses	O
PDF	B-Application
internally	O
"	O
(	O
notably	O
by	O
Apple	O
in	O
their	O
2000	O
Macworld	O
presentation	O
and	O
Quartz	B-Operating_System
's	O
early	O
developer	O
documentation	O
)	O
,	O
often	O
by	O
people	O
making	O
comparisons	O
with	O
the	O
Display	O
PostScript	O
technology	O
used	O
in	O
NeXTSTEP	B-Application
and	O
OPENSTEP	B-Operating_System
(	O
of	O
which	O
is	O
a	O
descendant	O
)	O
.	O
</s>
<s>
Quartz	B-Operating_System
's	O
internal	O
imaging	O
model	O
correlates	O
well	O
with	O
the	O
PDF	B-Application
object	O
graph	O
,	O
making	O
it	O
easy	O
to	O
output	O
PDF	B-Application
to	O
multiple	O
devices	O
.	O
</s>
