I need to get a hold of this game for two friends of mine who just so happen to use Macs.

The builds I find are corrupt or do ridiculous things to their video settings.

It was officially released so there has to be a copy somewhere I can get my hands on for less than 45 dollars (Amazon.com's asking price)

someone told me you may be able to find a copy of that on a torrent site...

Although i won't recommend you to download any thing...that would be piracy...and i do not encourage you to any illegal actions...if you know what i mean :P