I am thinking about making the switch to Mac.
Will Civilization 4 Beyond the Sword run at high settings on Windows XP on boot camp using an iMac with the ATI Radeon 2600 Pro? I've read that the video card is not a great performer for Civ 4. Most people who post seem to have Macbook Pros, which come with nvidia cards, but the iMacs have ATI cards (except for the most expensive model)
Thank you.

I have the 24" 2.8ghz Core2Duo, ATI 2600 iMac and CIV4 BtS works great in Windows xp through bootcamp. I run it at 1920x1200 with 2x anti-aliasing and everything on high. I've not had any problems yet, it's still been speedy in the final stages of fairly large games too.

Mine iMac has a 20" 2.4 Ghz with the ATI Radeon 2600, and Vista Ultmate 64-bit.

It runs good, I have only 1 GB of memory, so that's my problem. (I will buy after the holiday)