I have a PowerBook G4 with Leopard (OS 10.5) on it. I lost power during system updates. When the computer was started again, I was unable to login with the Admin password.
I have tried the following:
I used the Leopard Boot cd to reset the password, but when I tried to login, it wouldn't take the password.
I created a new Admin account using Single User mode, but again the password didn't work.
I tried using the root login and password, still the same result, couldn't log into the system.
I have read that, I need to reset the Keychain password.
All the solutions that I have found require you to be able to log into the system and use the Keychain