I asked this question (Original question: below) previously and spent several hours reinstalling (or so I thought) OS X 10.10 following the procedures in the link below (How to reinstall Mac OS X: How to access OS X Recovery mode - downloading and reinstalling OS X) - getting back to the same point with the same problem, Apple ID from the previous owner cannot be eliminated from the update process. As far as I can tell, I am back where I started long ago!
Again, I want to use a new Apple ID to install OS X and iWork updates to the OS. I am willing to reformat the disc or whatever is necessary to get the laptop to accepting a new (of my choosing) Apple ID for updating, etc. I have backed up all programs (.dmg) and data necessary to rebuild the system without purchasing new OS X 10.10. I really need help here!
Our office inherited a Macbook Pro with Apple ID active and enabled, I have been able to access this ID and update OS to OS X (10.10)
How do I:
Delete Apple ID from MacBook - still allow previous Macbook owner to use current Apple ID on other devices.
2. Add new Apple ID which I will populate with new email and password credentials.
I certainly don't want to mess up previous owner's Apple ID access.