I cannot remember the password for my MacBook
I cannot remember the password for my MacBook and I can't figure out how to reset the old password and set a new one. It is different from Apple ID password. It is the password specific to my MacBook. I need to figure it out so that I can make changes to the time and also allow installation of a software.
[Re-Titled by Moderator]
MacBook, macOS 10.12