The Mac beta version is now up:

https://www.aliaswavefront.com/en/pro...entalray.shtml

I've already noticed there are a lot of things that are not accepted in Mental Ray. A had to change all my .ps textures to .jpg just so Mental Ray would render. All in all though, I can't wait to get further into Mental Ray. It's only a 13 MB download, so you should be able to use it soon enough.

Long live Maya on the MAC!