It turns out development for Oculus Rift VR has been paused for Mac and Linux till after the 2016 Windows launch. – "We want to get back to development for OS X and Linux but we don't have a timeline." according to Oculus Atman Binstock.
Oculus has also specified the recommended hardware requirements to use the Rift.
• NVIDIA GTX 970 / AMD 290 equivalent or greater
• Intel i5-4590 equivalent or greater
• 8GB+ RAM
More information in the Oculus VR Blog.