This Mac Book Air was advertised as a renewed MacBook in "new" and "excellent" condition. The Amazon renewed policy is that it is supposed to be clean and working. It is in working condition, but it has not been cleaned. Even the Power Adapter is sticky and scratched up. There are scratches all over the bottom of the Mac Book case as well as several chips in the inside of the casing near the keyboard/track pad as well as around the screen. When I try to update to the newest MACBook operating system it says that the disk is encrypted and nothing can be saved to it. And, finally, the battery life is supposed to be 11+ hours, but it's only 6 hours. I have the photos to back up my claim.