System Space (445GB)- Why so large

Discussion in 'iMac' started by ScottNWDW, Dec 7, 2016.

  1. ScottNWDW macrumors 65816

    ScottNWDW

    Joined:
    Jul 10, 2008
    Location:
    Orlando, Florida
    #1
    I have a 2014 iMac and not understanding why the System is taking up 445GB. On my new MacBook Pro, system is only 24.42GB Both Machines are running macOS Sierra 10.12.1
    On the iMac....

    Screen Shot 2016-12-07 at 7.25.49 AM.png

    On the 2016 MacBook Pro Screen Shot 2016-12-07 at 7.38.48 AM.png
     
  2. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #2
    Try reindexing Spotlight by running the command below in Terminal. Give it a while to complete.

    That readout gets its info from the Spotlight index, and sometimes that index gets corrupted and it causes the readout to be all wrong.

    Code:
    sudo mdutil -E /
    Disconnect your external drive before you do this.
     
  3. bernuli, Dec 7, 2016
    Last edited: Dec 7, 2016

    bernuli macrumors 6502

    Joined:
    Oct 10, 2011
    #3
    Can you post the output of

    sudo du -xhc -d 1 /
     
  4. ScottNWDW thread starter macrumors 65816

    ScottNWDW

    Joined:
    Jul 10, 2008
    Location:
    Orlando, Florida
    #4
     
  5. bernuli macrumors 6502

    Joined:
    Oct 10, 2011
    #5
    I don't understand the output you are getting from that command, You should see something like :

    users-Mac:~ user$ sudo du -xhc -d 1 /
    192K /.fseventsd
    64M /.Spotlight-V100
    0B /.Trashes
    0B /.vol
    598M /Applications
    2.5M /bin
    0B /cores
    4.5K /dev
    1.0K /home
    825M /Library
    1.0K /net
    0B /Network
    1.2G /private
    1.0M /sbin
    4.7G /System
    141M /Users
    409M /usr
    4.0K /Volumes
    7.9G /
    7.9G total
    users-Mac:~ user$
     
  6. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #6
    An easier way to see what's going on is this:
    Download and use OmniDiskSweeper. It will provide a sorted list of what's consuming your space.

    If you run it with sudo in the terminal (As shown below), it will include some system files that it woud not normally have access to scan. That is a more accurate representation of what's consuming your drive.
    Code:
    sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
     

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