Hardisk formatting

Discussion in 'macOS' started by marketa, Sep 22, 2016.

  1. marketa macrumors newbie

    marketa

    Joined:
    Sep 22, 2016
    #1
    Hi,

    I have a question about hardisk formatting.

    I got a hardisk, which was previously used in the other device (not MacBook), hardisk is functioned and fully tested by previous owner. I put it inside of my MacBook Pro 2010 and started Internet recovery Mode. My question is: I can not change partition map, Hardisk has currently partition map Master Boot Record. in the disk utilities in menu bar the partition is not highlighted so I can not enter inside of it to change.


    It is some other way how I can do it? Thank you for an advice.
     
  2. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #2
    Get back into Internet recovery then start Disk Utility and go to the erase tab. Now in the left column at the very top select the drive itself. Then back on the right select "Mac OS Extended (Journaled)" in the dropdown then apply that format. That will reformat the drive and make it the proper GUID format so you can install OS X.
     
  3. JohnDS macrumors 65816

    Joined:
    Oct 25, 2015
    #3
    I am not sure that that will necessarily make the partition map GUID. If the partition map does not show as GUID after erasing, you may have to go to the Partition tab then hit the Options button to change to GUID.
     
  4. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #4
    It will if you select the disk at the top and not just the volume.
     

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