How to get PS3 Controller working in OS X Yosemite? (Mac)

Hello,

I've had this issue for quite some time and have tried many workarounds but have gotten no progress. I have an iMac with OS X Yosemite and my game in Unity does not respond to my PS3 controller (DualShock 3). I know Yosemite reads the controller via Bluetooth so I'm not sure if this is the problem. My PS3 controller works in everything but Unity, and I have tried other methods such as InControl and programs to auto-detect the controller as a gamepad, but Unity still doesn't detect it.

This has been happening since Unity 5.0, 5.1 and now 5.2. I'm also still new to Unity so I don't even know if the solution is a simple button click in some menu in Unity.