On a new MBP 16' and tried installing this 10.15.4 update from the system prefs. With a dark screen for over 30 min, I was forced to shut the unit down and restart. The System Prefs showed it had installed and was still showing the DL available to do it again. The computer wouldn't even restart after that or shutdown properly so I attempted it again and I "guess" the updated worked. Anyone else have an updating issue?
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10.15.4 Install Problems
- Thread starter mrmkanter
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It seems a few other people are: https://forums.macrumors.com/thread...date-bricked-my-13-inch-macbook-2018.2230133/