What is everyone bitching and moaning about? These are isolated cases, which should be dealt with, but are otherwise non-existent to most people.

I have TF2 running on my iMac on OSX and Bootcamp. There is a notable drop in FPS in the OSX version, but it still works as it should. Same goes for Crysis. I have installed it three times on three different computers using Windows 7 64-Bit and it worked right out of the box.

As for TF2, this is a more serious issue as Llama Juice's computer clearly meets the requirements of an officially supported game. Check Steam forums?