I purchased this Mac after I sent my first refurbished Mac back due to keys falling off and the OS not responding. This Mac has had nothing but issues. Slow response, failed programs and tasks, constant resetting to make it work at least somewhat efficiently. The ones who “refurbished” this Mac must have put some sort of background software or corrupted background program on it, you can’t erase to factory settings. Avoid refurbished units at all costs. Just spend the extra and buy new or from a reliable source.