buying used from private seller
If I buy a used Mac from a private seller can they turn around and have the device locked down by apple if they're disgruntled?
iMac Line (2012 and Later)
Question marked as
If they do not follow all of the steps here before selling it, yes they can. Never buy any used Apple device unless it has been properly prepared.
https://support.apple.com/en-us/HT201065