I've found a solution to this.
There's an issue in the gameinfo.txt, so download this modified one: Pastebin.com and put it in Contents/Resources/thestanleyparable
Comment History
kitthehacker - - 1 comments @ The Stanley Parable v1.4 for Mac OSX
Good karma+2 votes
Profile
kitthehacker
joined
This member has provided no bio about themself...