reset my Mac Mini to factory default (not my Mac)
I was given a Mac Mini at work. It's brand new out of the box, but when I turned it On it asked be for credentials, instead of going through the steps described in the small manual that came with it. I googled how to reset root password, created Apple ID from another PC, and was able to login.
But I think what happened is that we probably got a demo unit that was on display in a store. In this case I'd rather reformat my Mac to the factory defaults. However, when I try to install OS X from the recovery mode it did not accept my Apple ID as OS was not purchased using it. So, now I'm afraid to format the computer as Im afraid I will not be able to install OS on it afterwards.
What should I do?
We're all Windows based firm, this is a new project that client required a Mac for. And I cannot get any help in house even from admins as they don't know Macs.