Hi if I want to sell my 2012 MacBook Air how can I restore my air back to factory settings?thanks
Command-R on startup - reinstall the OS. Also a good idea to to a disk secure erase using the disk utility that comes up after the Cmd-R key as well.
Alright thanks for the help! This will prevent the future owner from seeing the things i had before or my passwords right?
Command-R on startup - reinstall the OS. Also a good idea to to a disk secure erase using the disk utility that comes up after the Cmd-R key as well.
diskutil zeroDisk /dev/disk0
I too am selling my 2012 MBA but the secure erase option is greyed out. Googling surfaces many confusing suggestions for many different models and years of MacBooks -- including the notion that SSD drives don't need secure erasing -- so I am curious to know what specifically works for the 2012 MBA.
I tried running secure erase from a 2013 MBA connected via thunderbolt to the 2012 MBA in Target Disk mode, but that estimate grew to 19 hours remaining after already running overnight (which was only a 3 hour estimate as I went to bed). So I aborted that.
Also, it seems my MBA 2012 is incapable of booting from a USB 3.0 key with either RecoveryDiskAssistant.dmg or Lion InstallESD.dmg restored to it. (Holding down option while booting does not surface the key as an option.) Does USB 3.0 only work when booted in non-recovery mode into OS X proper?
My next act of desperation is to either try the terminal command:
Code:diskutil zeroDisk /dev/disk0
and see how long that takes.
Or I could just try reinstalling Lion fresh and see if secure erase is un-greyed after that. If the damn USB 3.0 key could just boot I could install without the long wifi download.
It feels like everything is trying to delay my sale of this MBA.
In my MBA... the "secure erase" is grayed out too... but in the top header... there is an "unlock" icon. Clicking that and typing an administrator password unlocks the drive and the secure erase feature is enabled.
/Jim
... so people started wiping the disk by writing random or pseudorandom data to the disk to cover up old files. Some new Macs, such as the MacBook Air and Retina MacBook Pro come with Solid State Flash Memory that cannot be wiped in this manner because of hardware implementations.
...Say you write (create) a file that it 4 blocks. So the chip writes your data on blocks 1-4. As you add data, it randomly fills up the blocks. But when you go back and edit the first file created (1-4), it might not save it in the original location, it might save it in 105-109.
...