CaseySJ
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Hello @Daranski,Hi Casey,
I am getting ready to upgrade to Big Sur shortly (a fresh install on my current start-up disk), so wanted to make sure I had a back-up of Catalina before doing so.
I did the back-up of 10.15.7 using CCC. Then I did the supplemental software update for 10.15.7 and it went fine. Went to back-up again and towards the end of the process the back-up failed. CCC reported an error occuring at similar points like this...
/Volumes/Catalina Back-Up - Data/Users/darren/Library/Containers/com.apple.mail/Data/Library/Caches/WebKit/NetworkCache/Version 16/Blobs/740B79147B3786.......(I have edited this code down)
And
The postflight shell script exited with a non-zero exit status.
CCC recommends 'Verify that you can run the script manually without errors, and that it has a shell interpreter line at the top of the script (e.g. "#!/bin/sh"). Add "exit 0" to the end of your postflight script to suppress error reporting.'
The script I am using is the latest one from @byteminer's EFIClone from his GitHub repository as you recommend.
I did a disk utility first aid on the back-up drive and that comes up fine.
However disk utility first aid comes up with the following error for my start-up drive
The partition map needs to be repaired because there’s a problem with the EFI system partition’s file system. : (-69766)
I have not shutdown my computer to see if the Start-up disk will boot again. Thought I would ask your knowledgeable self before doing that.
Am using Clover bootloader 5122.
For the time being, please do this:
- Remove the EFIClone script from your CCC task.
- Manually mount the EFI partitions of the SOURCE and DESTINATION drives using any EFI mounting utility of choice. OpenCore Configurator --> Tools --> Mount EFI can be used.
- Then copy the entire EFI folder from the SOURCE and copy it to the DESTINATION. Replace the existing one if so prompted.
Does the backup of macOS boot up properly?