I have not confronted this on current working methods, however do not observe any previous guides (like this) about removing /var/db/.AppleSetupDone after booting into single person mode.
If this have been my Mac, I’d instantly attempt putting in macOS on an exterior drive to ensure your backup is sweet and visual from the brand new exterior OS earlier than making an attempt to excellent the system you’ve got. I’d then name Apple help as a result of I’d know extra about what’s damaged and they might know that I’ve the means to carry out a reinstall, saving tons of time. Or I might ask them to fill within the gaps in my course of why I could not do a reinstall.
In case you are certain that your backup and delete are stable, you may experiment as follows:
When you can enter iCloud Restoration Mode and attempt to reset passwordIt must be a protected factor to attempt.
Right here is an previous information that may additionally work particularly steps 2 and three. Something years earlier than that will not work. You’ll need to refine the system to mount the suitable file system in a state that enables the administrator account permissions to be reset.
The large downside is that your admin group will not be designed to drop the final admin person, so who is aware of what else is damaged in your OS. A reinstall is essentially the most prudent until Apple help has resolution and may let you recognize that they see this as a particular error with a restricted scope of failure and that it’s not an indication of normal failure of your working system (at the very least by way of account administration).
After all, if you recognize your backup is current and good, you can begin by deleting the set up and never fear about why this occurred. The recommended course of is stable and easy. Delete, import, transfer on and repair this provided that it occurs once more.
