It is necessary to enter the PC, to delete some important files, to make changes in the System Preferences and to create and delete new user accounts.How to reset your Exchange account on your iPhone/iPad The built-in mail app. In macOS, a password is required to perform a number of tasks. There are a number of ways to reset the password, even of an admin’s account, depending on the levels of security you have used while setting up your Mac Book.
![]() ![]() Enter In Terminal For Software Mac OS X DriveOpen Keychain Access and right click on login, and choose the option Change Password for Keychain "Login" from pop-up menu.3. Click Update Keychain Password and enter the old password at startup, or continue login and enter old password when you are asked.2. Update keychain password if you still remember the old one:1. After you are prompted to enter a command-line after numerous lines of status messages, type this command to mount the root Mac OS X drive as writable.Rm /Users/shortname/Library/Keychains/login.keychainNote: If you are not sure the shortname, please confirm it with command "ls /Users" at first.After Mac starts, you should have created a new keychain on Mac. Restart Mac and hold on Command + S to enter single user mode.2. Method 2: Reset Keychain password with command line in single user modeIf you cannot work with Keychain Access because of something like Messages Agent constantly asking for the forgotten login keychain password, you can use command line to reset Keychain password in single user mode.1.Verify it and click OK to successfully change keychain password.
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