How to completely restore OSX Lion

Discussion in 'Mac OS X Lion (10.7)' started by Kauai, Apr 20, 2012.

  1. Kauai macrumors 6502a

    Joined:
    Oct 13, 2010
    #1
    Hello,

    First of all, yes, I did do some google research. And followed all the instructions. But whenever I try to find out how to restore Lion all that comes up is information on how to recover it.

    I went through the whole CMD + R thing where I reinstalled it; but I want to wipe the computer completely clean with a fresh copy of Lion (which I downloaded from the App store) sans all files; like a new computer. Is this possible?
     
  2. phyrexia macrumors 6502a

    Joined:
    Sep 3, 2010
    #3
    When you CMD+R you need to enter Disk Utility and reformat your hard drive. This will ensure a clean install occurs. It will also delete everything on your hard disc, so you should attempt to back up your data before formatting.
     
  3. Kauai thread starter macrumors 6502a

    Joined:
    Oct 13, 2010
    #4
    If I reformat the whole drive will that wreck up the install; though, since the installer is on my computer? (I know it's internet-based too, but the actual installer is on my computer no?)
     
  4. tyrell456 macrumors member

    Joined:
    Dec 28, 2011
    Location:
    Salt Lake City, Utah
    #5
    Whenever you install Lion on a Mac (or it comes pre-installed), it creates a separate, small partition with the Recovery files on it. When you use CMD+R to boot into the Recovery mode, it boots into this partition. You can fully wipe and format the partition that the OS is installed on from here, and then re-install a fresh copy of Lion.
     
  5. phyrexia macrumors 6502a

    Joined:
    Sep 3, 2010
    #6
    My early-2011 MBP 17" will boot to Recovery mode with no hard drive installed. The recovery partition is not located on the hard disc. After I installed my SSD I was able to boot straight into Recovery mode. This was with a blank, freshly opened, unformatted SSD.

    Several months ago there was a firmware update for 2011 macs which apparently installs Recovery into firmware.

    I don't think this is the case on macs built before 2011. I am not sure of the specifics; this is how it works on my MBP.
     
  6. Bear macrumors G3

    Joined:
    Jul 23, 2002
    Location:
    Sol III - Terra
    #7
    There are several models of Macs from 2010 and 2011 which have firmware updates - see Computers that can be upgraded to use Lion Internet Recovery.
     

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