Not sure what happened. I have had Left 4 Dead 2 deleted from my computer for a couple of months. I think I installed Mountain Lion during that time and now when trying to use the controller with L4D2, the camera spins quickly in a circle while staring at the ground and I can't do anything. When I turn off gamepad in options, the keyboard controls and camera work fine. I also have boot camp and installed L4D2 on the windows side but the controls seem less intuitive and the default buttons are not how I'm used to. Anyway, I would prefer to play this game on my Mac side with the 360 controller. Any suggestions? Thanks!