enabled on Mac systems with one of the following types of graphics cards:
* AMD (ATI) Radeon, AGP-based, 16 MB VRAM minimum, or better
* NVIDIA GeForce2 MX, 16 MB VRAM minimum, or better

As of OS X El Capitan, Quartz Extreme is enabled on all supported Macs.

QuartzGL

QuartzGL (called Quartz 2D Extreme when