Disk space totals don't add up

Discussion in 'MacBook Air' started by japanime, Aug 1, 2015.

  1. japanime macrumors 68000

    japanime

    Joined:
    Feb 27, 2006
    Location:
    Japan
    #1
    "About This Mac" reports that I have about 20 gigabytes of free space available on my MacBook Air. Disk Utility also tells me I have 20 gigs available.

    However, the Finder view indicates I have 33 gigabytes of free space.

    I don't understand this discrepancy.

    [​IMG]
     
  2. 0d085d macrumors regular

    Joined:
    Apr 23, 2015
    #2
    My numbers are slightly different as well, now that I look (19.72 GB and 22.69 GB).

    I think that breakdown in About This Mac is drawn up from Spotlight indexing, so it might be that the space free is only as up to date as Spotlight.
     
  3. AFEPPL macrumors 68030

    AFEPPL

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    England
    #3
  4. motrek macrumors 68020

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    Sep 14, 2012
    #4
    That window is known to be horribly buggy.

    Best is to download a shareware program called Disk Inventory X and that will tell you what files are taking up how much space on your drive.
     
  5. japanime thread starter macrumors 68000

    japanime

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    Feb 27, 2006
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    Japan
    #5
    Thanks, everyone, for your answers and input. Re-indexing the drive did the trick.
     
  6. japanime thread starter macrumors 68000

    japanime

    Joined:
    Feb 27, 2006
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    #6
    Well, I thought re-indexing had done the trick, but the Finder view is back to indicating that there is more available space than the About this Mac window and Disk Utility indicate.

    Which window are you talking about? The Finder view, or About this Mac?

    In the meantime, as you suggested, I will give Disk Inventory X a try.
     
  7. japanime thread starter macrumors 68000

    japanime

    Joined:
    Feb 27, 2006
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    Japan
    #7
    I just found a thread in the Discussions on apple.com that addresses this issue. Seems that it is an issue with Time Machine and Finder. I followed the instructions (toggling Time Machine off, then restarting the Finder through a force-quit) and About this Mac and Finder view once again show the same amount of space available. Whew!

    https://discussions.apple.com/thread/7052513
     
  8. motrek macrumors 68020

    Joined:
    Sep 14, 2012
    #8
    Sorry for being ambiguous. The Finder "Get Info" window is correct.

    The "About This Mac" window is incorrect and the people who made it should be fired.

    I wouldn't worry about reindexing, toggling Time Machine, etc. to get that piece of crap to work right. It's a huge waste of time.
     
  9. DavidLynch macrumors 6502a

    Joined:
    Apr 9, 2015
    #9
    Mine is WAY off too. I assumed it was the most recent El Cap beta causing it.
     
  10. Phil A. Moderator

    Phil A.

    Staff Member

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    Apr 2, 2006
    Location:
    Shropshire, UK
    #10
    as mentioned
    It's not actually an "issue", but rather by design: By default, Time Machine will make local snapshots on a portable Mac - These snapshots are auto-managed and removed if space is needed.

    Because of this, Finder doesn't include the space used by local snapshots in its calculations of free space: If you look at your first post, the difference between the 2 (13GB) is the space taken up by backups

    If you want to completely disable the use of local snapshots, you can do it with this terminal command

    Code:
    sudo tmutil disablelocal
    
    This will disable local snapshots and remove the existing ones from your disk (it takes a while to clean them up though)

    You can re-enable them with
    Code:
    sudo tmutil enablelocal
    
     
  11. japanime thread starter macrumors 68000

    japanime

    Joined:
    Feb 27, 2006
    Location:
    Japan
    #11
    Then I'm still confused. Because when I toggled Time Machine off, the amount of available space being shown in the Finder decreased (to match the amount shown in About this Mac). Did the toggle make the Finder recognize the presence of the local snapshots that it was previously ignoring?
     
  12. Phil A. Moderator

    Phil A.

    Staff Member

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    #12
    It will until the old snapshots have been cleaned up (which can take a while)
     
  13. BigMcGuire macrumors demi-god

    BigMcGuire

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    Jan 10, 2012
    Location:
    California
    #13
    Does doing sudo tmutil disablelocal screw with timemachine?
     
  14. Phil A. Moderator

    Phil A.

    Staff Member

    Joined:
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    Location:
    Shropshire, UK
    #14
    It stops time machine from using your internal disk for local snapshots so if you're not connected to your backup device it won't be creating any backups but apart from that, I've not noticed any issues at all
     

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