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.
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Holding down Option key gives black screen
- Thread starter orbitalpunk
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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).
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.