If someone sold me a Mac Pro but doesn’t remember password or Apple ID how can I reset to my own
How do I change password and Apple ID to my own
iMac Pro
How do I change password and Apple ID to my own
iMac Pro
Sounds like someone may have sold you a stolen computer. You need to have the installer for the original version of OS X that was pre-installed from the factory. See What to do before you sell, give away, or trade in your Mac and Restore to Factory setting. Do you know the exact model?
If someone sold me a Mac Pro but doesn’t remember password or Apple ID how can I reset to my own