Our website provides a free download of ibex 5.0 for Mac. The software is included in Lifestyle Tools. This free software for Mac OS X is a product of Hesham Wahba.
From the developer:
ibex is a free virtual reality desktop tool for Mac OS. It will pause the rendering and head tracking till the app quits then it will pick up right where you left off. To launch apps regularly just use the desktop as usual. The application has multi-monitor support.
You may want to check out more Mac applications, such as Cheshire Life, OpenNumismat or dude, which might be similar to ibex.