Summary: I LOVE Civ 4, always have. I bought the mac download version a while ago but it suddenly became glitchy - all the links and buttons began to say FUNCTION_GAMEPLAY_KEY instead and I simply couldn't continue. Tried to re-download it but it didn't help.
Limited Compatibility - Understand before purchasing
3 September 2013
Summary: This add on for Civ 4 only works with the Steam purchased version of Civ 4. I purchased the Mac download of the Civ 4 game from Amazon and purchased this add on. The add on will not work unless you 1) Have or create a Steam account and 2) buy the Steam version of Civ 4 ($19.99) as of this writing. This should be explained better in the product description. Two stars not for the game quality, but for the distribution restrictions/requirements.
Summary: I would love to have tried out this game....but it is NOT compatible with MOUNTAIN LION. I'm receiving a refund as we speak. Just wanted to give the heads up. Do NOT purchase this product if you're working with MOUNTAIN LION.
Summary: This *is* the best civilization game to date, Fraxis did a good job in making it both more realistic and playable. It's a great deal of fun! However, Aspyr did a very *poor* port of the game. While the windows version runs on machines 2+ years old, the mac version only runs on the *latest* hardware. Performance is slow and painful on an iMac G5 and worse on G4 machines. Aspyr needs to release a patch soon to fix this game.
1.61 patch is much better than the initial release, but still slow
Michael Hayden, Amazon
28 July 2006
Summary: Ignore the system requirements at your own risk, because this thing runs like a fat sow on any machine more than a few months old. On my iMac G5 bought just a year ago, it's effectively unplayable at even the lowest graphics settings -- and that's at only 2000 BC! I won't even attempt to see what it's like with a full, modern world. Very disappointing.