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frogcoffee Author

Level 1

8 points

Error message: The macOS installation couldn't be completed

Out of the blue, I couldn't click or do any action on an internet page. The only thing that worked was the menu bar and favorites bar. I restarted my MacBook Air and after a minute or so go the error message: "The macOS installation couldn't be completed" along with some choices. I restarted my Mac and the same thing happened. I shut down my Mac and restarted and the same thing happened. Shut down and restarted again; same thing. What do I do? Note: the installer log shows in the background behind the error message.

MacBook Air 13", macOS 10.13

Posted on Apr 30, 2019 11:28 AM

Top-ranking reply

Tesserax

Level 10

152,236 points

Posted on Apr 30, 2019 12:04 PM

I suggest that you start by booting up your notebook into Safe Mode to see if this issue persists. Please post back your results.

Use safe mode to isolate issues with your Mac - Apple Support

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Error message: The macOS installation couldn't be completed

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