

Booting into the recovery console and running Disk Utility's first aid (which says did not encounter any problems).

Booting into the recovery console and re-running the Sierra install.Waiting 8 hours to see whether it'd move after all.

It'll get stuck on the boot screen (with the Apple logo) with the progress indicator completely finished. Yesterday I decided to upgrade from El Capitan to Sierra.Īs it turns out, that was not a good idea: the Installation worked, but now after the first reboot, the machine won't boot any more.
