I have the Windoze 7 64 bit. It won't install on a 27 inch iMac. I've read forum after forum and was on the phone with a mac tech for and hour. They said I needed Boot Camp version 3.1, but that is an exe file. The only thing I can think of it that you need to install it using Vista, then upgrade to 7. However I don't have Vista and want to do a fresh install. This sucks. Wasted 2 days now. Happens each time I buy a Mac. I buy too early. Anyone with a 27 inch ever install Windows 7 successfully?