I believe I might be completely hosed with my Mac Pro. So I wanted to install windows 10 on my 2010 Mac Pro. So I went through all the menus and the computer restarted and says no boot device detected. Unfortunately my Mac Pro came with a amd 5870 non Mac so I can't get to the hard drive select screen to go back to OSX. Now I'm pretty much stuck as resetting nvram did nothing. Is there any tricks to selecting the original OSX boot drive to be selected on startup without using the option select screen? --- Post Merged, Nov 20, 2016 --- This has been solved. How do I delete a thread?