Same problem here with wireless XBOX 360 controller, and i've also some minor problem with other games ( for example, in Air Supremacy - from App Store - my plane turns continuosly to left, but my controller works neat on other games).
I think it's a driver problem, why Apple or Mirosoft ( I'd prefer Apple ) release an official driver for such a common controller?
P.S. : OSX 10.8.2, iMac 24" mid 2007, 2,4 GHz Intel Core 2 Duo, 4 GB 667 MHz DDR2 SDRAM, ATI Radeon HD 2600 Pro 256 MB. Every game is obviously original.