How can you change your computer password on an IMac if you have forgotten the original password

Welcome!

You can change the password that you use to log in to your Mac, or reset the password if you don't remember it.

• If you're using macOS Catalina or later, see If you forgot your Mac login password - Apple Support.
• If you're using macOS Mojave or earlier, see: Change or reset the password of a macOS user account in macOS Mojave or earlier - Apple Support.

Jack

See the following Apple Support article for information on a forgotten Mac login password: https://support.apple.com/en-us/HT202860