I have been very busy working on my first app and I wasn't able to visit the forum for a few weeks, I'm glad to have the time to be here again!
In my example, the stereoscopic view shows the scene from two different cameras, that's all. Technically this should works on Mac too.
Are you trying to add anything else? It's hard for me figure out what kind of 3D effect you want to create in Mac with the stereoscopic technique I create. My example works because every side of the screen is dedicated for an eye and this create the 3D effect.
I don't own a 3D display, but I'll create an stereoscopic example for Mac to confirm.