You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: mrkp911
mrkp911 Author
User level: Level 1
4 points

"Time Machine Backup Not Completed"

Has anyone encountered their Time Machine not continuing to backup?


After a restart everything works fine and will back up on the hour for a few sessions. Then after the computer goes into a power nap, or sleep overnight, the next time I wake it up I get the "Time Machine Backup Not Completed" notice. It doesn't respond to the "Back Up Now" command either. If I restart the computer, it will start backing up again until it naps or sleep.


I've erased, reformatted and reconnected the backup disk to time machine last week; no change to the situation. My power saving settings have power nap enabled. This problem started after I updated to Big Sur 11.6 on an iMac (Retina 4K, 21.5-inch, 2017). I also ran first aid on the backup drive and it is fine with no errors.


Any suggestions to this problem would be appreciated.

Posted on Sep 28, 2021 3:27 PM

Reply
Question marked as Top-ranking reply
User profile for user: Old Toad
Old Toad
User level: Level 10
210,865 points

Posted on Sep 29, 2021 3:52 PM

Boot into Safe Mode according to Start up your Mac in safe mode - Apple Support and and try to backup for there. Reboot normally and try backing up again.


NOTE: Safe Mode boot can take up to 3 - 5 minutes as it's doing the following; 

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts 

• Deletes font caches, kernel cache, and other system cache files


View in context

Similar questions

6 replies
Question marked as Top-ranking reply
User profile for user: Old Toad
Old Toad
User level: Level 10
210,865 points

Sep 29, 2021 3:52 PM in response to mrkp911

Boot into Safe Mode according to Start up your Mac in safe mode - Apple Support and and try to backup for there. Reboot normally and try backing up again.


NOTE: Safe Mode boot can take up to 3 - 5 minutes as it's doing the following; 

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts 

• Deletes font caches, kernel cache, and other system cache files


Reply
User profile for user: mrkp911
mrkp911 Author
User level: Level 1
4 points

Oct 5, 2021 3:08 PM in response to mrkp911

Thanks to everyone who offered advice. Over the last few days I tried all the suggestions and still encountered issues with the backups not being consistent and failing. I did however solve the issue. I run a Western Digital HD for my backups. I uninstalled the WDDriveUtilityHelper and TWDDriveUtility software. Then a did a full shutdown and restart. Everything seems to be working again. I have not received the "Time Machine Backup Not Completed" notice for the last couple days, and backups are consistent with the times I have used my iMac.

Reply

"Time Machine Backup Not Completed"

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up