Like the title says. Here's some info about my computer. '08 iMac 10.5.8 2.4 GHz Intel Core 2 Duo 3gb RAM ATI Radeon HD 2400 XT I'm running TF2 at smaller than my native res in windowed mode, all settings on low, and a config that supposedly ups peoples fps by at least 50 (Chris' Config) which I saw no improvement with. My fps averages at 15... which is horrendous and makes the game unplayable without getting frustrated beyond belief. I know macs aren't that great for gaming, but that can't be the most performance I can get right?... That just seems... ridiculous to me. Any ideas fellas?