Hello, I'm new to all this steam account and orange ox stuff. If I want to play TF2 on my Mac, what EXACTLY do I need to do? Can't I just go to the store, buy TF2, install it via crosover or something? Or do you HAVE to make a steam account and download the entire thing? (that would mess up my download limit) Thanks! Ps: ANyone with a SR MB tried playing this?