This happened today, and I am writing this in case someone else have the same issue.
I have a corporate MAC, have separate password for Corporate and local password for the MAC.
Everything was fine, today the password stopped working, I was sure it is the password, won't work.
What didn't work...
- Single User Mode -> Setup Assistant -> New User -> Login as new user ->
sudo passwd <myusername>. Threw an error about authentication method not acceptable.
- Tried to reset from
Users and Groups. The
Reset Passwordbutton was not even there.
- Tried entering wrong password multiple times to trigger Apple ID reset, nothing.
- Command+R for Recovery mode didn't even take me to Recovery Mode.
Machine Specs: MacBook Pro (Retina, 15-inch, Mid 2015) macOS High Sierra Version 10.13.6.