do not have admin password
I just purchased a used iMac (Monterey 12.5) and do not have the admin password. I do I reset admin password?
iMac
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You can Not
Belo link is what the Pervious Owner should have done.
If not you will have to do this OR take it back to the Original Owner and have them do it.
What to do before you sell, give away, or trade in your Mac