OSX Complete re-install without disc, how?

Discussion in 'MacBook Air' started by lamerica80, Oct 22, 2012.

  1. lamerica80 macrumors 6502a


    May 22, 2008
    I just bought a usted Macbook Air. Its only a couple of weeks old but i still feel i want to do a complete system re-install.

    How do i do this withouth access to a disc?
  2. oxfordguy macrumors 6502a

    Feb 27, 2008
    Oxford, England
    Download OS X through the Apple Store (assuming you have a licence for it) and transfer to a USB key (think you need an 8Gb one) and install of that. It's dead easy. This may help: http://www.macrumors.com/2012/07/25/create-a-bootable-mountain-lion-usb-key-installer/
  3. aristobrat macrumors G4

    Oct 14, 2005
    If it's a 2011+ MacBook Air, they don't come with reinstall discs/drives anymore.

    Check out the "Internet Recovery" paragraph in the option below:
  4. lamerica80 thread starter macrumors 6502a


    May 22, 2008
  5. glutenenvy macrumors regular


    Sep 6, 2011
    To make it super easy if you don't want to do internet recovery:

    plus an 8gb flash disk.
  6. Mrbobb macrumors 601

    Aug 27, 2012

    Assuming there is a copy of the original installation image somewhere on the HD. With ML, unless u take the extra step to make a copy of it, ML install automatically deletes the installer after completion.
  7. lamerica80 thread starter macrumors 6502a


    May 22, 2008
    hm i just did a complete recovery, i downloaded lion and installed it, but everything looks the same, all the settings from the old user is still there.

    How can i make it so its like when you buy it brand new?
  8. Mrbobb macrumors 601

    Aug 27, 2012
    OK u suppose to...

    (1) Download but NOT install.

    (2) U create a bootable external HD or flash with the installer in it and boot from that.

    (3) U then use disk utility to ERASE your internal HD. That cleans it up.

    (4) THEN you run the installer.
  9. Mlrollin91 macrumors 603


    Nov 20, 2008
    Ventura County
    You would have to erase your drive and reinstall the operating system fresh. You can do it through disk utility.

    Mrbobb beat me to it. ^
  10. Weaselboy macrumors Core


    Jan 23, 2005
    It sounds like you just reinstalled without formatting the drive. Do this.

    Hold command-r when booting to get to the Recovery HD partition. Once that loads start Disk Utility and select Macintosh HD on the left then erase the partition. Then quit Disk Util and proceed with the install. It will take a bit as the OS will need to DLL from Apple's servers.

    This will give you a fresh install like out of the box.

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