I received a new MacBookPro9,1 which came with Mountain Lion. I was unsuccessful putting our enterprise 10.6 or 10.7 version of OS X on it, and have made repeated attempts to put a fresh copy of Lion on it. I continue to get the "restricted" sign and "This version of Mac OS X is not supported on this platform!" message. Our Apple System Engineer wasn't able to help, either.
Has anyone been able to get anything but 10.8 on a brand new MBP or have any other suggestions (besides providing a new image!)?
