I was surprised to see that my G5 would not handle Civ 4 too well. I have turned all options on except anti-aliasing, and my resolution is 1280x1024. Gameplay is glitchy, and although it is playable, I think the performance is not as it should be, especially on a G5 dual 2.5 GHz with X800XT inside and 1gbyte RAM. (OS X 10.4.7). The graphics are not that demanding, after all! Crappy port or demanding game?