Free/Used hard drive space weirdness?

Discussion in 'Mac OS X Lion (10.7)' started by Eradik, Aug 21, 2011.

  1. Eradik macrumors regular

    Jul 10, 2011
    Pacific Northwest
    So I don't know whats going on with my MacBook Pro. I'm running OS X 10.7.1.

    It all started with iStat Menus. I had hard drive usage turned on and my free space is listed around 237 GB.

    I checked the Finder (after turning the status bar back on) and it lists 306 GB free.

    I went into About This Mac and clicked storage, and it's reporting 253 GB free.

    Ummm.... what? I'm a bit confused. Anyone had this happen to them? I get iStat Menus being wrong because it is a third party program. But Finder/About both being different (and such a wide range different!)?

    Any ideas?
  2. paulsalter macrumors 68000


    Aug 10, 2008
    the difference between iStat menus and the mac could be the way disk space is calculated (SL/Lion use base 10, most things use base 2)

    in the about this Mac section, does it show an amount under backup, this could be the differences as I believe this is only temp used while the mac has the space
  3. Eradik thread starter macrumors regular

    Jul 10, 2011
    Pacific Northwest
    Thank you. It does appear that there is a backup calculated in About my Mac which, when left out, makes it balance out when subtracted from my total space and it matches what Finder says.

    I found an option to turn on Base 10 in iStat and it now matches About my Mac.

    Didn't know about backups.

    THANK YOU! :)

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