Apple supports full OpenGL 3.2 for Sandy Bridge under the Core profile. I believe that's the best support of any operating system, since I think even Intel's Windows drivers are only OpenGL 3.1. For better or for worse, Apple decided on a clean break and didn't implement a Compatibility profile. There's only a Legacy profile (OpenGL 2.1 + all OpenGL 3.0 extensions except GLSL 1.30) and a Core profile (OpenGL 3.2). I don't think any game on OS X currently uses the Core profile though. Perhaps Unigine will when it's finally released to the public.