Workaround for wrong HID usage descriptor sent by Bluetooth Gamepad?
I'd look at either getting some software to reproduce what the windows drivers do or look at hardware that has drivers for OS X.


http://joystickmapper.com/
http://www.orderedbytes.com/controllermate/


Also, on OS X, the games you are looking to use need to also support looking for wireless controllers, so that might be an issue for you as well that needs to be overcome.