I own the Mac version of Call of Duty 2, and my nVidia 24" iMac has been behaving very strangely whenever I play the game; every time I turn on the High Quality Rendering option, the game menu screen goes black, but then displays the high-quality graphics if I return to my current game. Could this be an implementation problem with the nVidia 8800GS? Also, I only get about 20 FPS regardless of settings. Shouldn't I be getting more? I am running the game at 1600x1200 res. with high textures, but still... Also, I noticed that during gaming, my iMac's fan never comes on, even if the computer is running extremely hot to the touch. The only time I ever heard the fan come on was during a hardware scan. Any help would be much appreciated, as I have posted before and never received any replies. Thanks! Here are my 24" iMac's specs: 2.8 GHz Intel Core 2 Duo, 2 GB RAM, 320 GB HD, 512 MB nVidia 8800GS.