Summary
You can reset your Mac login password by entering a password up to three times until you see one of the password-reset options.
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If you can't reset your password, you can contact Apple Support for assistance.
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You can also log in automatically to a Mac user account by choosing an account from the “Automatically log in as” menu.
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You can also login to Mac without entering a password by unlocking the Users & Groups window with your Admin Name and Password.
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According to
