I'm not surprised. We didn't have any Macs to actually test the game with. Nobody has had a problem so far with the build, so I was just riding on the fact that it was working for everyone up until now.
What gamepad are you using?
It's an Xbox 360 controller.
I guess everyone that downloaded the Mac version used keyboard. I'm sorry about that. I have no mac to test on so I would have no idea what to do about an xbox controller not working. I know the controller works with Windows. Does the controller work with most other games on Mac?