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Big Sur, Big Problems with Time Capsule

Folks, who else is having issues with backing up to Time Capsule with Time Machine after upgrading to Big Sur?


All my older backups are no longer accessible! Everything was working just fine before Big Sur. Time Machine now keeps asking to do a first backup. When I try to do a backup, it goes into "preparing" for 20 min, then "stopping," then nothing. 1st backup fails to complete.


I tried backing up with Time Machine to a WD external drive hooked up via USB. That works just FINE. It backs up MUCH faster than before too. So I'm guessing Big Sur is having issues with Time Capsule as a networked drive??

Posted on Nov 15, 2020 5:23 PM

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I just discovered that "Back Up Automatically" is the only way to go for Time Capsule.

No more the need for verification before an actual backup.

But any externally connected USB backup drive has to be disconnected.

Posted on Dec 3, 2020 4:35 PM

78 replies

Nov 23, 2020 10:11 AM in response to Bob Timmons

Thanks for the reply. I didn't run it prior to posting, but when I just did it came back with no errors.


Attempting to run another backup resulted in the same error reported previously.


I will attempt a backup to a USB hard drive shortly and report the results - but as you said, the snapshot is created on the internal drive, so we'll see how it goes.


I guess I should have stated that there is plenty of room available on the Time Capsule as well -



Nov 26, 2020 7:24 AM in response to stmccann

I’ve had a long session with Apple during which time we restarted everything to no avail, a PR start, pinged the ram, restarted in safe mode which actually instigated a back up of over 300 Gb which to around 7 hours over the network, but failed to make any further backups. Picking up the courage to continue where we left off, but I’m tending to think that previous comments have it in that there’s no solution until Apple address it.

Nov 30, 2020 2:20 PM in response to theping

My backup is working again, if limping along. I alternate between a USB external drive and Time Capsule as local networked drive.


The USB drive backup works fast and well. The Time Capsule needs to verify the entire backup TWICE before it will agree to actually backup. Consistently twice! However, the backup won't complete unless I remove the USB drive! Super tedious.


Big Sur, Big Problems with Time Capsule

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