So I did everything correctly, I've installed Crossover, then Steam and then TF2. When I try to launch the game, it shows the Valve screen, then Source, then the loading screen which stays on for 3mins and after that the a big, resized, not responding Steam window appears. I'm using Macbook 2007 (2Ghz C2Duo, 2,5 ram, Intel GMA X3100) with OS X Leopard (tomorrow I'm getting SL update disc ). Is it caused by the old OS? I think I'm the only one with this problem. Also, I'm not really able to install Windows via Bootcamp (I can do it but I'd prefer using Crossover) Oh and sorry for my English, it's my second language and *****.