Then, just copy activation code in your Amazon digital library, open Steam, "Games", "Activate a product on Steam," and paste the code to download the PC version.
So: download the MAC version even if you have a PC.
Can't argue with free:
Game activates and downloads via steam. Do not waste time downloading from Amazon. The Amazon download is Mac version.
Edited by yabber, 28 January 2012 - 05:07 PM.