3 Replies Latest reply: Jan 12, 2012 7:35 PM by zchrykng
ilari Korte Level 1 Level 1 (0 points)



I noticed that my Finder status bar shows incorrect amount of available space. Actually the amount of available space is larger that the actual disk size. The same problem is experienced if I click "Get Info" on my Macintosh HD. It also shows drive capacity as 249.82GB and Available as 252.7GB.


All the other tools, for example Disk Utility and About this Mac/Storage show the correct information, which is that I have 115.46GB of free space on my Macintosh HD.


Any idea what could cause this? Or has anyone else experienced similar problems?


Oh, and I have Filevault 2 turned on.



MacBook Air, Mac OS X (10.7.2)
  • 1. Re: Hard drive available space shown incorrectly in finder
    quicksilver8 Level 2 Level 2 (310 points)

    Available, i.e., the total storage of your disk.

    Drive capacity: the amount available for store and write, excluded other space, used for software at low-level (i.e. Recovery Disk), which you can access to restarting with Command-R).

    Free space: the space available to write into your disk and store your files before it becomes full.

  • 2. Re: Hard drive available space shown incorrectly in finder
    ilari Korte Level 1 Level 1 (0 points)

    Maybe I should be a bit more specific:


    Currently the Get Info for Macintosh HD shows the following:


    Capacity: 249.82 GB

    Available: 282.69 GB

    Used: -- bytes (-- KB on disk)


    While for example df -k shows the following (which is accurate):


    $ df -k

    Filesystem                        1024-blocks      Used Available Capacity  Mounted on

    /dev/disk1                          243966468 152025216  91685252    63%    /

    devfs                                     181       181         0   100%    /dev

    map -hosts                                  0         0         0   100%    /net

    map auto_home                               0         0         0   100%    /home

    localhost:/ezioMnNoyRVU8Vj-YxC4cJ   243966468 243966468         0   100%    /Volumes/MobileBackups


    No matter which way you look at it, the Finder currently calculates the available (free) space incorrectly.



  • 3. Re: Hard drive available space shown incorrectly in finder
    zchrykng Level 1 Level 1 (0 points)

    This is probably like the issue that I was having on my MacBook Pro. If you are using Time Machine on a laptop it stores the diffs in a file on your hard drive. This action can be disabled with the terminal command


    sudo tmutil disablelocal


    This turns the local Time Machine off. It is up to you if you want to do this, but Finder shows this space as unused since it can be overwritten when needed. It saved me over a hundred GBs of space.