Sadly Oculus will not be useable on Mac’s or Linux machines for the foreseeable future.
Our development for OS X and Linux has been paused in order to focus on delivering a high quality consumer-level VR experience at launch across hardware, software, and content on Windows. We want to get back to development for OS X and Linux but we don’t have a timeline.
This isn’t overly surprising, but disappointing since so many “creative” professionals use Mac’s.
For the conspiracy theorists out there it should be acknowledged that Microsoft reportedly owns around 1.5% of Facebook, which in turn owns Oculus (http://whoownsfacebook.com).
Check out Oculus’s full post here: https://www.oculus.com/blog/powering-the-rift/