DllNotFoundException: OculusPlugin on a Mac

Anyone ever figure this out? I checked through an old thread but it was PC-centric. Are the OVR controller not supported in Unity Free anymore? What gives? I'm running Unity 4.5.2... system specs are:

iMac
3.1 GHz Intel Core i7
NVIDIA GeForce GT 650M 512 MB
OSX 10.9.5


Any help would be awesome. This is driving me nuts. Thanks, guys.