MacBook Pro question on former owner I have a used MacBook.  The former user was still the admin so I Googled and followed instructions to remove his password and get myself in as admin.  I then deleted his user account.  

I just looked at my settings on my iPhone and saw under messages "share with FORMER USERS NAME MacBook"

How do I get his name off of everything?  I don't see him at all under user accounts. I don't have any discs, install media, etc.
You need to change the name of the MacBook, not just the user account.  

You will find this in System Preferences -> Sharing.  The Computer name can then be changed by selecting edit (you may have to unlock, first).