That is indeed the issue. The rest of the system is OK, but the video card is very marginal. The question is how much of a problem it would be (i.e. playable on low graphics settings or not).bio_hazard said:@Beamup- you've probably already checked the specs of your iBook, but lots of PC users with 'fairly new' machines have had trouble with Civ4. Especially watch out for the video card.