Fixing a stalled Time Machine backup

Christopher Breen
12 November, 2013
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Reader Ernest Wilson is in earnest when he says he’s having problems with Time Machine. He writes:

My Time Machine backup has stopped working and I don’t know why. I see a message about a ‘sparse bundle’ being in use. How do I fix my problem?

This is most often associated with a confused AirPort Base Station or Time Capsule (more often with a Time Capsule that’s used to back up more than one Mac). The first thing I’d do is launch AirPort Utility (found in /Applications/Utilities), select your base station or Time Capsule in the resulting window, and click on it. In the small window that pops up, take a peek at the version number. If it’s not 7.6.4 you should update it. Among the changes wrought by this update is: “Resolve(s) an issue that may cause AirPort Time Capsule to report that the backup disk is in use.”

To update your device just select it. If an update is available an Update button will appear in the resulting window. Click it to update the device.

If your base station or Time Capsule is already up-to-date and you’re having this problem, restart it. You do this by selecting it in AirPort Utility and choosing Base Station > Restart.

Still having problems? Try rebooting your entire network. Do this by depriving your network devices of power – the broadband modem as well as your Airport device. Then bring them back to life, powering up your modem first and waiting for it to make its internet connection. Once it has made that connection, plug in your base station or Time Capsule, wait for its lights to turn green, and then see how Time Machine behaves. You should no longer see the error.

by Christopher Breen, Macworld


3 people were compelled to have their say. We encourage you to do the same..

  1. Glen says:

    Hi Christopher

    I decided to follow these instructions and discovered that my TC was running Firmware 7.5.2 so promptly updated. Now it just keeps flashing the yellow light, and in the Airport Utility under Status, it says ‘No DNS Servers’.

    What do I do now?


  2. Macworld Australia Staff says:

    We’ve sent a message to Christopher with your query – will let you know as soon as we get a reply. Macworld Australia staff

  3. Macworld Australia Staff says:

    Hi Glen – this from Christopher Breen…
    “If this were my device I would unplug it as well as unplug my broadband modem. Then boot the modem and wait for all its lights to blink correctly. Then, plug in the power to the Time Capsule. This should establish the DNS server information being served by the modem.”
    Hope this helps. We’ll also send you an email.
    all the best
    Macworld Staff

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