Cannot delete installed application (.dmg) files

Discussion in 'OS X Mountain Lion (10.8)' started by andy8, Oct 26, 2012.

  1. andy8 macrumors regular

    Jan 6, 2009

    I am having some trouble deleting files from trash. Whenever I install an application on Mac and then i delete the particular (.dmg) file, I get an error message such as

    "The operation can't be completed because the item (.dmg package file) is in use"

    When I check the finder window, the file would have been ejected and its no longer mounted on Mac.

    Please help. Thank you.
  2. stridemat Moderator


    Staff Member

    Apr 2, 2008
    Do you drag the applications icon to your applications folder on your mac?

    There is a handy guide here explaining how installing should be done.
  3. andy8 thread starter macrumors regular

    Jan 6, 2009
    Yes. I drag them to the App folder. But there is another thing to mention. I use TotalFinder application. It may be that the latest update is affected with a bug.

    I have contacted the developer and hopefully a fix arrives soon.
  4. waynep macrumors 6502

    Dec 31, 2009
    Did you "eject" the dmg file? Make sure it's still not mounted?
  5. andy8 thread starter macrumors regular

    Jan 6, 2009
    Found the mistake I made

    I have found my mistake. I didn't check the Devices box in the Finder preference.
    There are no bugs in the update--its my error.

    I apologise if there are any inconveniences that I may have caused.

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