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When I try to boot up my MacBook Pro I get a large lock symbol asking for my password. I have put in every password I know, and it won't work. I am on my Mac Mini, so I know mu Apple password. Anyone know what is going on here?
Lock icon
If you set a firmware password on your Mac, you might see a lock icon at startup if you try to start your Mac from another volume like an external drive or macOS Recovery. Enter your firmware password to continue starting up.
About the screens you see when your Mac starts up - Apple Support
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Restore a MacBook Pro that is locked
