I am having problems with the Mac Mini finding the SSD start up disk(which was in My Mac Pro). I wanted my exact same setup from my 2006 Mac Pro so I just took out the SSD and swapped it into the Mac Mini. Was I not supposed to do it that way? I am getting the No entry sign. I appreciate the help. BTW tried starting it with the original HD that came with the Mac Mini via USB 3 adaptor works fine and I can see the SSD in the Mini. I just can't boot from it.