the MacBook Pro received would not power up or charge. Asked for assistance from the seller with no response. Amazon  did respond promptly and tried to help by paying for a Apple authorized dealer to run diagnostics & they determined it would cost over 800.00 dollars to repair, more than the computer is worth. Amazon said to return the item for a full refund. I am now waiting to hear from the seller that they received the non-working Mac Pro and my refund has been issued.