Question: MacOS High Sierra password stopped working
After updating my 2015 macbook pro to High Sierra, I got prompted to enter iCloud options. As I do not have any use for iCloud, I choose to disable iCloud and create 'separate password'. After doing that, I could not login onto my computer at all, using either password.
I tried to use recovery menu, and surprisingly, it was completely useless.
Time Machine => It asked hard drive password, which I have no idea and none of my password worked.
Re-Install OS => It asked hard drive password, which I have no idea whatever.
Terminal => Reset Password
It seems to be working, but when I entered new password, it showed 'Internal Error'
This is a surprising glitch, and it effectively shut me off from my own computer.
MacBook Pro with Retina display, macOS High Sierra (10.13.1)