Of course, this assumes that you haven't also forgotten the password for the other administrator account.
If you don't remember that password, either, you can try one of the other two methods outlined below. Launch System Preferences , and select the User and Groups preference pane. Click the lock icon in the bottom left corner of the preference pane, and then supply your administrator password.
Resetting the password this way creates a new keychain file for the user account. If you wish to use the old keychain file, see the instructions below. Actually, you can use this feature to reset the password for any user account type, including a standard account, managed account, or sharing account.
You would have associated your Apple ID with your user account either when you originally set up your Mac or when you added user accounts. After entering your password incorrectly three times at the login screen, a message will display your password hint if you set one up , as well as the option to reset your password using your Apple ID. Click the small right-facing button next to the …reset it using your Apple ID text.
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A warning message will display, telling you that resetting the password will cause a new keychain file to be created. Your keychain holds frequently used passwords; creating a new keychain usually means you'll have to resupply passwords for some services you use, including email accounts and some websites you've set up for automatic log-in. Click the OK button to reset the password. Follow the instructions in the Mac Troubleshooting - Reset User Account Permissions guide to restart your Mac with the appropriate media and launch the Password Reset app. Once you have the app window open, come back here to continue.
In the Reset Password window, select the drive that contains the user account you wish to reset; this is usually your startup drive. Use the Select User Account drop-down menu to choose the account whose password needs to be reset. A warning message will display, telling you that the keychain password wasn't reset and that you'll need to change the keychain password to match the new password you entered.
Click the OK button. In the dialog box that opens asking if you really want to quit OS X Utilities, click the Restart button. If you don't see this message, FileVault isn't on. Press and hold the power button until your Mac turns off. Press the power button again to turn on your Mac.
Five Ways to Reset a Lost Administrator Password
When the Reset Password window appears, follow the onscreen instructions to create a new password. When done, click Restart. If you were able to reset your password with the Reset Password assistant, log in to your account using your new password. At the login screen, keep entering a password until you see a message saying that you can reset your password using your Recovery Key. If you don't see the message after three attempts, FileVault isn't on.
4 Ways to Reset a Lost Admin Password on Mac OS X - wikiHow
The password field changes to a Recovery Key field. Enter your Recovery Key. Use uppercase characters, and include the hyphens. Follow the onscreen instructions to create a new password, then click Reset Password when done. If you can't log in with your new password after restarting your Mac, take these additional steps: In the Terminal window, type resetpassword , then press Return to open the Reset Password assistant pictured above.
Create a new login keychain, if necessary After resetting your password and logging back in to your account, you might see an alert that the system was unable to unlock your login keychain. Open Keychain Access, which is in the Utilities folder of your Applications folder. After you enter your new password, Keychain Access creates an empty login keychain with no password.
Click OK to confirm. Press the Delete key, then click Delete References. There should be a checkmark next to it.
Change or reset the password of a macOS user account
The option to recover Mac password using Apple ID becomes available when you enter a wrong password three times in a row. Keep in mind that the Apple ID recovery process requires you to have access to the email address you used when registering your current Apple ID. Have you forgot Mac password and are you not afraid of using admin tools to recover it? Then you can try to reset your admin password using the Recovery Partition.
This tremendously useful portion of the boot disk has been part of the Mac OS X operating system since the version It contains a barebones version of Mac OS X with essential admin tools. To access the Recovery Partition, you need to switch to the Recovery Mode. When encrypting a storage device, FileVault automatically generates a recovery key. You can use this recovery key to reset the login password for your account.