Several IMG reader reviews, as well as the IMG review itself, have listed as a con that FSAA (full screen anti-aliasing) is broken in Mac Halo. However, a quick turn around the forums at Gearbox that ported Halo from the Xbox to the PC will turn up the fact that Halo does not support FSAA. The Halo PC Performance FAQ at HBO covers this under point 1.3.1. The IMG review claims that MacSoft said this was due to a "bug in ATI's drivers", however, Halo on the PC doesn't support FSAA on Nvidia cards, either, so I doubt this is caused by a bug in ATI's drivers. And I don't see how Mac Halo would support FSAA if PC Halo doesn't, unless something about DX9 compared to OpenGL is responsible. So while the lack of FSAA support might still be considered a strike against the game for those who are used to it, this isn't a bug in the game or in anybody's drivers-- it's just not there, and turning it on will reduce your framerate.