I have a macbook black with a 2.4GHz intel 2gb ram 667MHz GMAX3100 Will it run with Steam and CSS? I have Steam and never used it before so if I buy a game off of steam will it run? No bootcamp no parallel I used crossover for steam. Would I have to use crossover to install it as well or is having steam enough? Also does L4D work with it since it can run CSS and HL2?