Cannot Enlarge Partition

Discussion in 'Mac Basics and Help' started by sahejdeepsingh, May 25, 2014.

  1. sahejdeepsingh macrumors newbie

    May 25, 2014
    Hello to all the cool and smart people out there!

    Today I installed Mountain Lion after creating a partition on my Lion. After I booted into Mountain Lion partition, I went into Disk Utility and deleted the Lion partition(Thinking that all the free space will be added to Mountain Lion partition). Now I cannot enlarge the Mountain Lion partition now :(

    Here is how it goes...

    I want to increase the size of Mountain Lion partition. Please help ASAP!!
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    You can't resize a partition when it is in that bottom position like that.

    What you need to do is add a partition back to the top 91GB area and format it to Mac OS Extended (Journaled). Then follow this video to use Disk Util to clone from the Mountain Lion partition to the new one on top. Once you have booted to that new partition and confirmed all is well, you can then delete the lower partition. Then resize the top partition to fill the space left at the bottom.

    None of this will erase your data, but do a backup first just to be safe.
  3. Fishrrman macrumors P6


    Feb 20, 2009
    Try this:
    1. Since the first partition is erased, boot from the Mountain Lion partition -- you're probably there already.

    2. Download CarbonCopyCloner from here:
    (CCC is FREE to download, and FREE to use for 30 days)

    3. Launch CCC and clone the entire contents of the second partition to the first partition.
    IMPORTANT: Be sure you have given the first partition a distinctive name so you can recognize it later.

    4. Once the clone is complete, reboot to the first partition again.

    5. Now, launch Disk Utility. Erase the contents of the second partition. Then, see if you can use DU to remove it.

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