Resolved I can't resize my 2nd partition on my MacBook Pro

Discussion in 'OS X' started by Jessica Lares, Jul 1, 2013.

  1. Jessica Lares, Jul 1, 2013
    Last edited: Jul 5, 2013

    macrumors 604

    Jessica Lares

    Joined:
    Oct 31, 2009
    Location:
    Near Dallas, Texas, USA
    #1
    So I have my Mountain Lion partition, and my Mavericks one. I'm trying to make my Mavericks one slightly larger. The problem is Disk Utility in either version of OS X, and the recovery partition won't let me do it.

    I can resize my Mountain Lion one, but then not my Mavericks? :confused:
     
  2. macrumors P6

    Weaselboy

    Joined:
    Jan 23, 2005
    #2
    Try a command-r boot to recovery and use Disk Util from there to resize.

    Make sure you have your data backed up first in case things go sideways.
     
  3. macrumors G3

    Joined:
    Jul 23, 2002
    Location:
    Sol III - Terra
    #3
    You can only make a partition larger if there is space after the end of the partition. You cannot change the starting location of the partition without losing the data on it.

    There may be third party utilities that can do that, but I'm not sure I would trust those.

    And definitely have backups before re-sizing partitions. Actually, just always have current backups.
     
  4. thread starter macrumors 604

    Jessica Lares

    Joined:
    Oct 31, 2009
    Location:
    Near Dallas, Texas, USA
    #4
    Really?! Damn. Okay then. If anyone knows of an app that can do it, I'll give it a go. No problem doing that.
     
  5. macrumors 65816

    Dalton63841

    Joined:
    Nov 27, 2010
    Location:
    SEMO, USA
    #5
    It's not a Mac limitation. It's the nature of how the partition tables are made. The only real way to do what you want would be to make an image of the second partition, put it somewhere safe, then delete the second partition and recreate it so that it includes all the now empty space, and restore the image back to it.
     
  6. thread starter macrumors 604

    Jessica Lares

    Joined:
    Oct 31, 2009
    Location:
    Near Dallas, Texas, USA
    #6
    Good idea. Thanks. So basically,

    1. Resize the Macintosh HD
    2. Add another partition, size it the way I want
    3. Restore Mavericks to that
    4. Delete Mavericks
    4. Resize it to fill in the remaining space?
     
  7. macrumors 65816

    Dalton63841

    Joined:
    Nov 27, 2010
    Location:
    SEMO, USA
    #7
    Yep that way could work. Or if you have enough space on the Macintosh HD partition to hold an image you could:

    1. Open Disk Utility, click New Image, and point it to Mavericks.
    2. Delete Mavericks.
    3. Create new partition using all empty space.
    4. Restore the image to the new partition.

    Whichever way you prefer will work.
     
  8. macrumors 6502

    Joined:
    Jul 14, 2008
    Location:
    Arizona, USA
    #8
    iPartition (https://www.macupdate.com/app/mac/15360/ipartition) does the trick. I used it several times and had no problems with it - it just can take a long time to get the job done.
     
  9. thread starter macrumors 604

    Jessica Lares

    Joined:
    Oct 31, 2009
    Location:
    Near Dallas, Texas, USA
    #9
    Oh god, that was a nightmare! You'd think you could do this all in the recovery disk utility, but it was a mix of booting into recovery, Mavericks, and Mountain Lion to do each step because my disk wouldn't unmount. Took like two hours, but I finally just finished.

    Now I understand why reinstalls/upgrades never worked on my machine. :rolleyes:

    And yeah, I did it my way and just resized Mountain Lion, added a new partition, and then restored Mavericks to it, removed the 40GB one, and then resized the new 200GB one.
     

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