Hi! I've recently installed the Orange Box on my Aluminium 13" Macbook (2.4Ghz). At first, the games ran fine, but soon I started experiencing a lot of crashes (happened with HL2, HL2 Episode 1, Team Fortress 2, (haven't tried the others)). Sometimes the game just freezes (i hear a repeating sound), then quits. I get different error messages every time: "The instruction at '0x0######' referenced memory at '0x#####'. The memory could not be 'written'" or "This application has encountered a problem and needs to close." but sometimes I don't get any message (the game just quits). Turning down the graphics settings to "low" didn't help. I tired disabling the background programs but that didn't help either. I would appreciate your help! Thanks in advance.