Okay I finally got around to loading windows 7 professional onto my mac pro. I am typing this with windows and not mac os x. I have never had a mac setup to run windows I always keep my pc with windows and my mac with lion or snow. So at this time I do not know how to leave windows 7 and go back to snow or lion. I have 3 hdds in the pro one is windows one is lion and one is snow. other then power down fully and just leaving in a mac osx drive with all other drives pulled how do I go back to my mac os x?.