Hi, I'm looking to buy a used macbook air from eBay and I've come across one which appears to be having an issue with the SSD. The description says that he tried to install the beta version of Yosemite and he left it overnight and the upgrade failed. He said he then made a bootable USB with Yosemite on it and formatted the SSD. He said it then came up with this error I was just wondering if any of you knew if this was fixable as it only has 1 hour left and is pretty cheap at the moment. Cheers for any help!