I Just bought at 5.1 Mac Pro. When starting it up it shows terminal text flashing by, lots and lots of it. And after that it comes in to the Mac OS everything looks Ok. When i choose turn off again the black backgrond with white text shows up and gives lots of data in a way that i cannot read before it shuts down. When i put the power cable and plugged the USB the computer started automatically. Is this something that anyone would recognize? I tried Sierra and 10.8 disk and they both show same thing. Also it says that data & time is wrong. The display shows colors that are not 100% correct, when i go into settings an klick the calibration profile it changes for a second and then changes back to the "incorrect" state. Maybe somwthing is broken on this machine?