On the mac the NVIDIA drivers are released by Apple. Usually with OS updates. Panther may very well fix this as it has updated drivers and OpenGL. What version of the OS are you running? Quartz extreme is for accelerating the actual OSX GUI using OpenGL. This is available only on 10.2 and above. Basically you need an AGP Mac with a newer AGP card (any ATI Radeon or NVIDIA GeForce card). It uses the Cards GPU to accelerate the windows and drawing of screen objects. If you have the hardware to support it, OSX automatically enables it. It makes a huge difference in performance when using the OS, It is not going to help with 3D rendering apps though. Personally I feel that the ATI cards are better supported on the Mac and seem to have less glitches with the 3D apps I have. (Bryce, Carrara, Vue, Strata.) Look into an ATI 9600 - 9800 Pro, you will be impressed. Regards, Paul