It showed up in amazing condition and I was able to update it to Monterey MacOS highest OS available to the MacBook Air 11” (early 2015). Technically Monterey is not supported by Apple Support or are they making anymore updates for it. But it carries Safari 17 and most sites like Netflix only require Safari 12.5 for standard streaming but Safari 15 to be able to view live stream content. So there’s a little wiggle worm to make this laptop last a couple years longer before programs require more OS functionality. So for me wanting a small laptop, keeping it Apple while wanting to not buy new and buy referb to be more eco and economic friendly… I am super pleased. Minor ding on the side but other than that battery life, track pad and screen all are great.