I'm playing the game now on a dual 2 GHz G5 with 1 GB RAM and nVidia 6800 Ultra. I set the game to 1680 X 1050 and maxed everything out and performs like crap, not to mention no pixel shader effects are enabled on Mac. I had hoped anything I threw at the 6800 would be no problem. Anyone else having performance problems? I'm also playing it on my Dell XPS laptop with 256MB Radeon 9800 Mobility at 1920 X 1200 with everything maxed and all pixel shader options on. It is smooth as silk.