Also, if something goes wrong with your Mac or your use account passwords, the login or Local Items keychain passwords could be lost as well, or they could revert to a previous user password. What do you do if you forget a keychain password? That’s difficult to do with the default keychains that use your user account password, but it’s quite possible with keychains you’ve created.

How to Recover or Reset a Keychain Password

Click the Change Password button, type your current password into the Old Password text box, then put your new password into the New Password and Verify boxes. To change your account password, go to System Preferences > Users & Groups. If you ever want to change your keychain password, you can just change your user account password to keep this convenience going. You don’t need to unlock them separately to start using them. It means your keychains are unlocked once you log into your Mac. This arrangement can be really convenient, as you only need to remember one password to access all of your other passwords, and you also only need to remember one password to make quick purchases. But to see and alter keychains on Mac, you usually have to type out your user account password. Touch ID and Face ID can even be your primary keychain password on iPad and iPhone. This can include using Touch ID when inputting keychain information into websites and servers. The keychain password in Keychain Access and iCloud Keychain defaults to the password you use to log into your Mac user account. How to Change a Keychain Password on Your Mac

Mac keychain set up a new password