Bought this laptop Mac pro ok can’t get it to back up it say Apple verification

albertfromferris wrote:

Got it in a gauge sale I have no info from the person who sold it to me how can I use it if I can’t get it to install a buck up

The previous owner had to have done this prior to selling the computer:

What to do before you sell, give away, trade in, or recycle your Mac - Apple Support

otherwise the computer is worthless to you.