I forgot my Mac password
how do I log in my minstaller?
.totally forgot my password
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What to do: If you forgot your Mac Login Password
https://support.apple.com/en-us/HT202860
or
If you can't reset your Mac login password
https://support.apple.com/en-us/HT212190
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For Apple ID: if also forgotten:
How to: Check your Apple ID device list to see where you're signed in - Apple Support
Recover your "forgotten" Apple ID online:
https://iforgot.apple.com/password/verify/appleid#
If you forgot your Apple ID email address or phone number:
If you forgot your Apple ID email address or phone number - Apple Support
If you forgot your Apple ID password, or have issues when you try to sign in :
If you forgot your Apple ID password – Apple Support
How to: Get a verification code and sign in with two-factor authentication - Apple Support