Summary: It took forever to get here and It certainly was not "complete," as it claims.The CD did not have all the drivers or whatever it needed to make it run. We tried it on 3 different computers and it would not work without downloading Net Framework.
Summary: Despite the description saying "Mac OS X 10.5.8 or higher" this does not work with the latest OS X version, Yosemite. You get this error message: "You can’t use this version of the application “Civilization IV” with this version of OS X." and it is documented elsewhere on the web.
Summary: Apparently this download will not work on the new Yosemite for Mac. So money wasted... Don't download and please let me know if I missed something. I contacted Aspyr and their site stated this version is not compatible with Yosemite and they have no patch in the works. Wasted money.
Summary: This will not work on OS 10.10.1 and Aspyr is fully aware of the problem though they make no mention of it here. When you visit their support page you will find that buying it here gives you a version that will not work with the latest operating system.