My iMac said that there was an update for my iMac which is running High Sierra. When I installed it, it booted with the following error .....
"The operation couldn't be completed. Undefined error: 0 Quit the installer to restart your computer and try again."
I did so and it boots up to the same screen.
HELP!!!
Please?
iMac 27″, macOS 10.13
Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode?
It won't boot into the software.
Which update was it exactly?
I am not sure. It was the one that popped up in my notifications just a couple of days ago. I said to go ahead to install without really paying attention, like an idiot.
What OS are you on now?
Anything showing in Software Update?
Are you still stuck?
Mac OS could not be installed on your computer
