i went ahead and installed this game on my new macbook pro (2.53GHz, 4 GB ram, nvidia 9400m). I have everything on low settings, except for texture and sim detail which are on medium. I also have object hiding on. I get a solid 45-50 FPS when I am home alone. It goes anywhere from 20-40 fps when I go around town depending on the amount of trees/people. It is definitely playable, although I wish it ran a little better considering the settings I have it set on. it hasn't crashed on me in game yet, although it did freeze up once for a minute or so before letting me play again.