Won't Launch (Mac OS 10.8)

[Clarity]

I remember playing this a couple of weeks ago and I think I was on 10.7. Not 100% sure. When I try to open the game, it opens on the dock for a half a second then disappears. I tried reinstalling and rebooting but nothing works.

[slumbur]

I'm having the same problem. It was working last week too (I was ona 10.8 both times)

[Clarity]

I just remembered you have to play it from the Library location which is /Users/YOURUSERNAME/Library/Application Support/Steam/steamapps/ I remember when I first got it, I played right from Steam that and I had like 10.5 something at the time.