
With seemingly no other recourse, I clicked Restart one last time, held down Command-Option-R to boot into macOS Recovery, and reinstalled the operating system. I looked through the log and saved a copy, but none of the errors looked all that problematic. However, clicking the Restart button just brought up the screen and error dialog again.
#Mac operating system for macbook pro mid 2012 install
Instead of booting normally, I ended up at a screen containing only an Installation Log window and an error dialog saying “The macOS installation couldn’t be completed.” That was confusing since I hadn’t asked the App Store app to install macOS 10.13.4. Restarting my AirPort Extreme Base Station didn’t seem to help, so I restarted the Mac. A few days ago, I got up early to get some writing done, but my 27-inch iMac’s Internet connection was being horribly slow, and the entire machine was struggling. It’s unusual that I see something entirely new on my Mac. #1577: iPhone 12/12 Pro repair program, fix corrupted Chrome extensions, iCloud Mail custom domains, Chipolo AirTag alternative, 10-digit dialing changes.


smart displays, iOS 12.5.5 and Catalina security update, iPhone 13 problem with Apple Watch unlocking #1581: New Safari 15 features, Center Stage vs.
