I have a Sony DUALSHOCK 3 SIXAXIS controller, I can use it as a USB controller on my OS X Mountain Lion MacMini and it works perfectly. I have it set up in Bluetooth so that when it is not connected via USB, I just press the Playstation Logo and it connects instantly via Bluetooth. In my humble opinion, Sony DUALSHOCK 3 SIXAXIS controllers are overpriced, so I bought a gioteck PS3 VX-1 Wireless Controller for $29.99. It is identical in every way to the Sony controller except the shape and that it doesn't come with a lithium ion battery and instead takes two AA batteries or a battery pack like the ones you put in an XBox 360 controller. The "Cheap" controller works identical to the Sony controller when connected via USB.
Gioteck Vx-1 Drivers
Download: https://miimms.com/2vJTIx
The problem (I think): gioteck did not properly set the values transmitted via Bluetooth upon connection. The Bluetooth Type is "Unknown" instead of "Peripheral", the Name is "PLAYSTATION(R)3Conteroller-ghic" instead of "PLAYSTATION(R)3 Controller", the Services are not set instead of "PnP Information Wireless Controller", the Major Device Class is "0x1f" instead of "0x5", the Minor Device Class is "0x0" instead of "0x2", and as expected the Product ID and Vendor ID are different from the Sony.
Then, connect your PS3 controller to your PC via the mini-USB cable to install the initial set of PS3 controller drivers. When the initial installation is complete, download the following (these are necessary for the SCP software to work): 2ff7e9595c