format

Discussion in 'macOS Mojave (10.14)' started by Dsampedro, Oct 14, 2018.

  1. Dsampedro macrumors newbie

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    Oct 14, 2018
  2. cmaier macrumors G5

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    Jul 25, 2007
    Location:
    California
    #2
    What do you mean? Format what? A disk?
     
  3. Dsampedro thread starter macrumors newbie

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    Oct 14, 2018
  4. cmaier macrumors G5

    Joined:
    Jul 25, 2007
    Location:
    California
    #4
    Sorry, this question doesn’t make any sense. Are you asking how to install Mojave?
     
  5. Dsampedro thread starter macrumors newbie

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    Oct 14, 2018
    #5
    I have Mojave installed in my computer and I want to format my computer's hard drive.
     
  6. cmaier macrumors G5

    Joined:
    Jul 25, 2007
    Location:
    California
    #6
    The hard drive that has the system on it? Then your computer won’t work. Or a different hard drive? If different, then use Disk Utility, which is an app included in Mojave.
     
  7. fisherking macrumors 604

    fisherking

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    Jul 16, 2010
    Location:
    ny somewhere
    #7
    your computer's drive is formatted and then the OS is installed on it.
     
  8. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #8
    Here is the answer:
    1. You need a way to boot the Mac using an EXTERNAL drive that is bootable.
    2. You then open Disk Utility and "aim it" at the internal drive (topmost item in DU's list, and you MUST first choose "show all devices" from the popup menu (if there is one)
    3. You then click the "erase" button and choose "Mac OS extended with journaling enabled".
    4. DU will then erase the disk and "format" it.
     
  9. fisherking macrumors 604

    fisherking

    Joined:
    Jul 16, 2010
    Location:
    ny somewhere
    #9
    5. remember, this will wipe anything on your computer drive, so be sure to back everything up first.
     
  10. northernmunky macrumors 6502a

    northernmunky

    Joined:
    Jan 19, 2007
    Location:
    London, Taipei
    #10
    @Dsampedro give us some more info so we know we're telling you to do the right thing.
    Am I to assume you have Mojave and are unhappy with it and want to downgrade to another macOS version?

    Would be good to know why you want to wipe your hard drive, because once you've done that you will need to run internet recovery and theres various methods of downloading and installing specific operating systems.
     

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9 October 14, 2018