Hello, I recently bought a used macbook pro with 2 years of warranty remaining. But since this mac has only had 1 owner, i'm concerned about this person cancelling the warranty and getting a partial refund. I have not mentioned this concern with him since he may not be aware of the possibility of the partial refund(don't want to shoot my own foot). Is there anything I could do to prevent such an incident or is there no such thing and i'm just overthinking? I am new to the whole mac system, so i'm sorry for my simple questions. Thank you for your time.