hey Guizmo12,
I have a macboook 2.0Ghz, 1GB RAM and I've bought and installed the orange box. First i tried it in bootcamp, bad idea, only half life 2 ran all the others got to the loading screen then crashed. Installed it in crossover, everything runs well except parts where there is a lot of things happening. Such as the end of portal impossible to play i finished it but it took ages and i had to face the wall to get an ok frame rate. TF2 is a bit jittery in places with lots of people and firefights. Im upgrading to 2Gb RAM soon to see if it gets better :D. Portal drops in frame rate when you look through portals but other then that everything is great.
Genesis.