Holding down Option key gives black screen

Discussion in 'Mac Pro' started by orbitalpunk, May 17, 2017.

  1. orbitalpunk macrumors 6502

    orbitalpunk

    Joined:
    Aug 14, 2006
    #1
    I used to be able to get to the partition selection screen when rebooting my 2013 Mac Pro and holding down the option key. Now its just a black screen. Anyone have a similar issue and a solution to this. It used to work just fine.
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    The same setup? e.g. same monitor, same resolution, etc.
     
  3. Synchro3 macrumors 65816

    Synchro3

    Joined:
    Jan 12, 2014
    #3
    Afaik option boot on Mac Pro 6,1 works only with less than 4K Resolution.
     
  4. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    I think the last OS update 10.12.4 fixed this issue, which allow the nMP boot with 4K 60Hz, but not sure (I don't have this machine).
     
  5. orbitalpunk thread starter macrumors 6502

    orbitalpunk

    Joined:
    Aug 14, 2006
    #5
    Yep, all the same. The only thing that's changed are macOS updates. I noticed this when installed Bootcamp and after Bootcamp partitioned the hard drives and rebooted to install windows for the first time, it was a black screen.
     

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