Okay, so I have a Quad-Core mac pro 2.66GHz and an 8800GT (512MB). I've been playing Call of Duty 4 on it and overall it's not too bad. However, I have to turn all the special settings off (like shadows, specular map, depth of field and anti-aliasing) to get the game to perform decently. I have Vertical Sync turned on (because I hate horizontal tearing) and I get 45-60fps in most maps (with all that extra stuff turned off). It even goes down to 30fps in some areas. Here's the thing. Yesterday, for the fun of it, I installed Windows Vista in Boot Camp and downloaded the Call of Duty 4 Demo and compared it to the Mac game. I was able to get 55-60fps CONSTANT in the demo with shadows, specular map and depth of field turned on! In the same spot on the Mac version with the same settings, I get 20fps. This is extremely disappointing to me. Are the Mac video drivers THAT bad or is it a crappy port by Asypr? My question is... will Apple update the video drivers for the 8800GT to unlock the speed that Vista is giving me or will I have to get an even higher end graphics card? To think, here I was thinking the game ran fine in OS X... until I saw how it runs in Vista. This is terrible. Now there's one more thing the PC folks can brag about to us Mac users. Edit: When I was comparing the PC Demo to the Mac full game, I made sure I was in the same level and area in the game.