external disk has always problems ejecting safely

Discussion in 'Mac Accessories' started by McCloud94, Jun 14, 2018.

  1. McCloud94 macrumors member

    Sep 9, 2016
    Not sure if this is a "Mac accessory" per se..

    I have a relatively new external disk, exFat..

    Always when I try to eject it, I get the error that it can't be ejected because it's in use.. even though it's not.

    I tried running First aid on it too, but again I get this error that it couldn't be unmounted.

    Any ideas what could be wrong ?
  2. LS417 macrumors regular

    Oct 30, 2009
    Are you sure there is no program using it?

    This happens to me when I leave final cut open after working on the drive or if I've emptied the trash while the drive is connected, the Mac will then clear off all the deleted files that I've ever deleted off the external drive and this can sometimes take a long time depending on how long its been since the last time I emptied trash while the hdd was connected.

    using time machine?
  3. chabig macrumors 603

    Sep 6, 2002
    Next time you eject it, quit all of your open applications one at a time until you figure out which one is holding the disk hostage. Then you'll have your answer. Based on my experience, Preview is often the culprit.
  4. chscag macrumors 68040


    Feb 17, 2008
    Fort Worth, Texas
    Next time it happens, open your "Activity Monitor.app" (Applications -> Utilities) and see if you can spot what is using the drive. If you find it, you can quit the app or process right from the Activity Monitor and then eject the drive. Sometimes though, nothing works. In that case, just reboot and remove the drive.
  5. McCloud94 thread starter macrumors member

    Sep 9, 2016
    thanks, I'll try it the next time...

    Even though I'm 99% sure all applications are closed when I try to eject it...

    Even used 'What's keeping me' which shows just some random processes.. no specific app.

    And it only happens with this drive.. every time. On Windows too.
  6. green86 macrumors 6502a


    Sep 27, 2007
    North Carolina
    Reformat the drive.

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5 June 14, 2018