Catalina 10.15.6 time machine backup failure

5Pickle5 wrote:

Failed again! Time for a new drive.

Yes, you can suspect the drive is failing.

"Time Machine has completed a new backup for you, or get a message saying it can't create the backup,"

or

"fails to complete a backup."

This message reappears most likely the TimeMachine disk is operating in a state of failure and will continue to fail with increasing frequency.

The solution would be to replace the drive.

5Pickle5 wrote:

I just set up a new 27” IMac Retina 5K 2020 and all is well except Time Machine.

I get repeated errors stating that I am attempting to back up any encrypted disk (the T2 chip, I assume) to an unencrypted disk, a 1 TB USB Seagate Backup Plus that worked well in he past, is formatted GUID Partition Map, and I don’t need to encrypt. I also get cryptic errors stating “files could not be backed up.” Duh.

I understand that a lot of people are having these problems but I don’t see a solution.

I am willing to abandon Time Machine for a better software solution.

Help, please, and thanks in advance.

Learn more about backup disks that you can use with Time Machine —https://support.apple.com/kb/HT202784

If you need to create a new backup from Mac—

https://support.apple.com/guide/mac-help/if-you-need-to-create-a-new-backup-mh34042/10.14/mac/10.15

https://support.apple.com/guide/mac-help/time-machine-troubleshooting-mh15653/mac

If your new Mac inherits your backup history - Apple Support

https://support.apple.com/guide/mac-help/if-your-new-mac-inherits-your-backup-history-mh35732/mac

Backup disks you can use with Time Machine - Apple Support

https://support.apple.com/en-us/HT202784

I will add...

3-2-1 Backup Strategy: three copies of your data, two different methods, and one offsite.

—Boot clone https://discussions.apple.com/docs/DOC-10081

—How to use Time Machine to back up or restore your Mac: https://support.apple.com/en-us/HT201250

—Use DiskUtility Restore feature https://support.apple.com/guide/disk-utility/restore-a-disk-dskutl14062/mac

note: >System Preferences>Security & Privacy >Privacy>Full Disk Access

unlock the padlock, press the + button and add Disk Utility

5Pickle5 wrote:

I may have stumbled onto a solution, however.

I unmounted my back disk, renamed it, remounted it, and we’re off to the races! 15 GB backed up so far; never made it past 3 before.

Renaming the drive in effect is starting a new TM backup.

https://support.apple.com/guide/mac-help/if-you-need-to-create-a-new-backup-mh34042/10.14/mac/10.15

If "Time Machine you get a message saying it can't create the backup,"

This message reappears most likely the TimeMachine disk is operating in a state of failure and will continue to fail with increasing frequency. The solution would be to replace it the drive.