Install Os X after overwritten by Windows?

Discussion in 'Mac Basics and Help' started by Phasebook, Nov 7, 2014.

  1. Phasebook macrumors newbie

    Nov 7, 2014
    Hey guys,
    I have a strange problem and I am not sue if I am posting in the right group...
    A friend of mine has one of the old iMacs(2007-2008 A1224 20'') and he gave it to someone to fix a problem with the OS. This smartass installed a fresh copy of WIndows 7 by overwriting the current OS X and windows(he was using Bootcamp and rEFIt for booting both Windows and Leopard). Now when you turn on the ocmputer there is no Apple logo or boot manager, just a white screen for some seconds and after that it starts booting Windows...
    Is there a way to get back to Os X? The owner is missing the original disk, so can you give me an advice if a new retail disk is bought, would it work and which one should he buy?
    I would be glad if people with similar problem share some experience...
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    Just call Apple at 1800MYAPPLE and give them the model number and they will sell you the grey OEM installer disks specific to that Mac. Then you can boot to that DVD and use Disk Utility to reformat the drive and install OS X.
  3. Phasebook thread starter macrumors newbie

    Nov 7, 2014
    Thanks, I will definitellydo that tommorow, it sounds like the best thing I can do :)
  4. Mr Hildy, Nov 7, 2014
    Last edited: Nov 7, 2014

    Mr Hildy macrumors newbie

    Mr Hildy

    Sep 12, 2014
    United States
    Well put. Just to add a little more detail to what was said above: When you get your disc, turn on the Mac and hold down Command + R until it takes you to the menu screen with Disk Utility. From there, insert the disc and proceed to format your hard drive to "OS X Extended (Journaled)" and re-install OSX.

    Good luck!

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