User blog comment:C0var1ant/Horribly Rushed Beta Game Engine Test Time!!!!/@comment-5910413-20121226105347/@comment-5463954-20121226160000

It just occured to me, that you might not have python installed on your mac. I tested it on my mac and it runs, so it might be that. You need to have python 2.7 installed which you can get from here

(64-bit Macs)

Python 3.3.0 Mac OS X 64-bit/32-bit x86-64/i386 Installer

or

(32-bit Macs)

Python 3.3.0 Mac OS X 32-bit i386/PPC Installer