How to use a second hand Macbook Pro with new Apple ID
I got this second hand Macbook Pro for free somewhere that I don't remember, but the problem is, is that when I try to log in with my Apple ID, it seems like it doesn't want to let me in the Mac. I can't see what's the problem with it. I used my Apple ID on Itunes, yet it worked, even after that was done, the Mac always says: "This item is temporarily unavailable. Please try again later.", after I put in my Apple ID and password.
MacBook Pro 13″, OS X 10.11