works fine on high settings shadows off, nice and playable. quite supprising. one note, plug it in when you play this game, as i noticed when i got to 20% power and below it seemed to throttle the performance, quite significantly. dont have frame rates, however it was more then playable. allso tested SC2, medium shadows off very smooth. just letting you all know as not many people seem to have reported on civ 5, this was the one downloaded from the mac app store, dont know if they tuned it more to lion, however im quite pleased.