It cannot be ported. You'd need to use Wine to emulate the windows environment for Civ 5.
G
Oh? I didn't realize I can run a relatively "heavy" Steam game such as Civilization under Wine. Thanks, I'll take a look, it will certainly be quicker to try out than setting up bootcamp...
(Edit: Just to make it clear, I am not any sort of Mac zealot, it is just that due to my job my workstations have to be Mac and Windows runs under Fusion which does not do games).