Re-Sizing boot partition

Discussion in 'Mac Basics and Help' started by AcesHigh87, Oct 21, 2014.

  1. AcesHigh87 macrumors 6502a

    AcesHigh87

    Joined:
    Jan 11, 2009
    Location:
    New Brunswick, Canada
    #1
    A bit of background before I get into my main question:

    Without a second mac hat was compatible I was running the Yosemite beta on a second partition of my internal HDD. It installed and ran perfectly fine. However with the OS officially released I deleted the partition in order to upgrade my mac in full.

    Now, however, I can’t re-size my boot partition (Macintosh HD) in order to fill up the space that Yosemite was taking up. I can pull the corner in Disk utility and it doesn’t give me an error when I hit apply but nothing appears to happen. I’ve attached a screenshot of what it looks like.

    At first I assumed it was because I was running off the partition so I booted my iMac into the recovery partition and tried in there. However when I pulled the partition out and hit apply I received an error about not being able to unmount. I don’t remember the exact wording now but it didn’t work obviously.

    So, that brings me here. How do I get this unpartitioned space back to being my Macintosh HD partition? I would like to get this figured out before I install Yosemite so that my computer is fully back to normal in advance. I’m sure I could clean install Yosemite and just start from scratch off a time machine backup but I would much rather not go that route.
     

    Attached Files:

  2. dilap macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #2
    This happened to me. I checked that I had read and write access (which I didnt)to Macintosh HD, changed it so I did, then restarted Disk Utility. Have you googled it? If that doesn't work than install Yosemite and then resize
     
  3. AcesHigh87 thread starter macrumors 6502a

    AcesHigh87

    Joined:
    Jan 11, 2009
    Location:
    New Brunswick, Canada
    #3
    Only system had read & write, others just had read. Nothing different when trying while booted but I didn’t think that would work. I’ll try from recovery when I get a chance later.

    Googling the problem got me few results unfortunately. Mostly just saying boot from something else for it which I can’t really do since I don’t have anything else to boot from.
     
  4. dilap macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #4
    Change the permissions by pressing the plus button and pressing your username. Change that to read and write
     
  5. AcesHigh87 thread starter macrumors 6502a

    AcesHigh87

    Joined:
    Jan 11, 2009
    Location:
    New Brunswick, Canada
    #5
    Yeah, Sorry, meant to say that I had done so before testing again. I'll see how it works booting from recovery.
     
  6. AcesHigh87 thread starter macrumors 6502a

    AcesHigh87

    Joined:
    Jan 11, 2009
    Location:
    New Brunswick, Canada
    #6
    I sorta got it working. What was suggested unfortunately did not help and neither did booting from a Mavericks USB key unfortunately.

    What I wound up doing was creating new partitions to fill the gap, dropping them to minimum size and then deleting them before hitting apply. It's weird but after 3-4 goes it basically worked. I'm still missing around 50GB of space which sorta sucks but it's better than the alternative.
     

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