OS X disk space fluctuates wildly on my MacBook Pro

Discussion in 'OS X El Capitan (10.11)' started by uptownnyc, Nov 20, 2015.

  1. uptownnyc macrumors 6502

    Mar 28, 2011
    I've been dealing with an ongoing problem with my early 2011 MacBook Pro. I have a 250gb SSD as my primary drive, and I swapped out the DVD drive for a 1tb drive. I've moved a bunch of things over to the secondary drive, but still encounter wild swings in the available space on my primary drive.

    Yesterday I was receiving warnings that my disk space was critically low, and it was down to less than 1gb of free space. Today it's back up to 20gb of free space.

    I've used Grand Perspective to see where the space is going, and I see most of it is being used, but I can't see where the ~20gb or so of free space disappears to so quickly. Since I began typing this message, I've dropped ~2gb of free space.

    Any suggestions on how to identify where it's going?
  2. keysofanxiety macrumors G3


    Nov 23, 2011
    The issues you're encountering are normally synonymous with a corrupted volume. Have you had an opportunity to verify the volume in Disk Utility?

    If this comes out clean, the problem may be related to local Time Machine backups. To disable these, please ensure you have a password set. Open Terminal, type sudo tmutil disablelocal and hit Enter. It will prompt for your password. Please be aware you'll have to type in your password blind as it doesn't show any characters that were typed. Hit Enter once your password's typed in to apply the command. Then restart with 'reopen windows when logging back in' disabled.
  3. uptownnyc thread starter macrumors 6502

    Mar 28, 2011
    Disk checks out okay, and I ran the time machine command, rebooting afterwards. I rebooted with ~14gb of free space, and I've since crept back down to ~11gb over the past 10 minutes.
  4. uptownnyc thread starter macrumors 6502

    Mar 28, 2011
  5. leman macrumors G3

    Oct 14, 2008

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