DiskImageMounter can't be opened (-36)

Discussion in 'macOS Sierra (10.12)' started by GerritV, Dec 23, 2016.

  1. GerritV macrumors 65816

    May 11, 2012
    Double-clicking on my old TimeMachine backup results in an error message "DiskImageMounter can't be opened (-36)". It used to work before, so it might be caused by my recent update to 10.12.2 ??

    The file info says it should be opened by DiskImageMounter per default. Also, I can perfectly open other dmg's.

    All suggestions on how to access my old TimeMachine data are very welcome.
  2. MTShipp macrumors 6502a

    Mar 25, 2009
    Raleigh, North Carolina
    Same issue here. Following this thread in case someone has an answer.
  3. dianeoforegon macrumors 6502a


    Apr 26, 2011
    Most likely the file itself is corrupted. The error -36 often indicates a hardware issue. If the file is on a bad disk and you try to copy the file, you get the -36 error. If the following does not help, the file is too damaged to recover.

    Try running Disk Utility > Repair Disk. Disk Utility can be found in Applications/Utilities.

    See other options here:
  4. GerritV, Dec 24, 2016
    Last edited: Dec 25, 2016

    GerritV thread starter macrumors 65816

    May 11, 2012
    Thanks for the tip. Unfortunately, my TimeMachine backup file is on a TimeCapsule.
    This device doesn't show up in Disk Utility's sidebar.
    I now wonder if the Terminal command from your yahoo link will work ?

    Next, my wife's TimeMachine backup file is on the same TimeCapsule, and producing the same error. So file damage on both, at the same time, looks a bit too coincidental to me.

    I've looked closer into it, and in fact I can't open ANY file on my TimeCapsule drive.
  5. bcave098 macrumors 6502a


    Sep 6, 2015
    Northern British Columbia
    I think it's a 10.12.2 bug. Try to open a file from an app (i.e. open the app, or Disk Utility, first then open the file), I'd bet it will work normally.
  6. GerritV thread starter macrumors 65816

    May 11, 2012
    Thanks, your tip works !! Why didn't I think of that ?

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