If your Mac’s password has been forgotten or is no longer working for any reason, you can use the FileVault Recovery Key to reset the password on your local account.
- Start your Mac and wait for the Login Screen to appear.
- Either click the Question Mark to the right of the password field, or enter the wrong password 3 times to see your recovery options.
- Click on “Restart and show password reset options”.
- This will restart the Mac and show you the Recovery Assistant Reset Password interface.
- Enter your FileVault Recovery Key and click on Next.
- Select your local account and click Next.
- Follow the prompts to reset the password on your local account.
- Restart the Mac and use your new password to log in.