Yes, absolutely correct ... I did erase and clone again and it is booting, for my current 11.5.1 ... also posting some more info below. Since this started with Big Sur, I am guessing the "reclone" is here to stay ...
Now need to ponder if I want to make this a routine with every OS update. This would probably something like monthly give or take which seems manageable. In my case creating the boot clone took ~ 25min as I'm using a SSD and currently have ~ 420GB ...
View attachment 1813643
and when you click on the "?" this is additional info ...
Things you should know before relying on an external macOS Big Sur boot device
This procedure relies on Apple's proprietary APFS replication utility, which is outside of our developmental control. We welcome feedback on this functionality, but we cannot offer in-depth troubleshooting assistance for problems that Apple's replication utility encounters.
For the reasons noted above, we do not generally recommend that you attempt to make your backups bootable; we recommend that you proceed with a "Standard Backup" instead. You can restore all of your documents, compatible applications, and settings from a standard CCC backup without the extra effort involved in establishing and maintaining a bootable device.
- Whether the destination is bootable depends on the compatibility of your Mac, macOS, and the destination device. We cannot offer any troubleshooting assistance for the bootability of the destination device beyond the suggestions offered in our External Boot Troubleshooting kbase article.
- The destination may not remain bootable if you subsequently update the data on the backup after applying OS updates to the source.
- Apple's replication utility may cause a kernel panic while cloning to the internal storage on Apple Silicon Macs, which could prevent you from restoring your Mac's system from the backup.
- Apple Silicon Macs will not boot at all if the internal storage fails. An external bootable device will not serve as a rescue disk for that scenario.
Just upgraded to 6.0.3-b3 and also Monterey B5 - then did a back up after both updates - it did an "incremental back up" (1 min 4 sec) about 4 gig of new or replaced files (4 days since prior back up)- and shows up in the start up disk as an available start up disk (bootable).Carbon Copy Cloner 6.0.3-b2 available if you have beta downloads enabled
Past "SuperDuper" BU users, and now giving up on trying to keep CCC for bootable BU creation: Apple is consistently blocking external HD backup software (E.g., SuperDuper or CCC) due to questionable "bootability of the destination device", arising out of Apple's HD formatting hurdles! Hmm! We (1) do not want to "speculate" about our back-up's reliability, (2) we do not feel good having to confirm a CCC "disclaimer" that accepting a destination drive formatted by Apple "is outside of our (CCC) developmental control" and, "depends on the compatibility of your Mac, macOS, and the destination device". It appears Apple is leaving us with only two non-bootable backup choices: Apple's time machine or Apple's iCloud, both Apple proprietary systems! Please, we need reliable external hard drive bootability without needing to accept CCC or any other vendor's "disclaimer". Can anyone help?
(We use Apple's macOS Big Sur 11.5.2 on fully loaded iMac Pro computers and stay current on Apple OS updates.)
Thanks for the info.I trust CCC far more than "Time Machine" - and despite all the comments on these forums and the "apple discussions forums" I have been able to make bootable back-ups for Catalina, Big Sur and Monterey along the way
As of Big Sur and Monterey the "system files" are locked - but - I have been able to make bootable clones on both Big Sur and Monterey - the only issue is that the macOS system is stuck at what ever version the 'Initial Clone" was done at - for example I just did an incremental back up on my BAK drive that was initialized at Monterey Beta 4 and have done multiple incremental back ups along the way (Monterey Beta 5 and Monterey Beta 6) 2 times a week that take about 1 to 2 min - very fast and no issues and have booted from the external back up many times to verify
The external drive boots fine with all the recent files and data - but - boots into macOS Beta 4 - this can be solved by booting from the clone and updating that "System" to the newer macOS - but I am not concerned that it has the very latest macOS version - as long as it boots fine and has all my recent data - which it does.
My suggestion is to get a working and bootable drive - preferably pick an empty drive - wipe it clean, format APFS, and make only 1 partition - then make a back up with CCC - if you do this you will not have to bother with the "Legacy Assistant" which I find confusing.
I have seen others post that installing the latest Big Sur or Monterey update on top of the clone to bring it up to date - but seems like too much work to me - it is really not that hard to wipe the destination drive once in while and make a complete new back up of the new upgraded system from scratch - especially if the target drive and the destination drive are both SSD's?
All that being said - I have been backing up 2 times a week (Clone) and never had a back up fail and always boots up fine with the most recent data and files - so CCC seems very reliable in my case and in fact is super fast
Thanks for the info.
Btw., I don't see the problem when you must boot from a backup that "missed" 3 or 4 intermediate system updates.
I suppose the copy-back will easily be updated again to today's level by APPLE as you boot it. Am I wrong?
;JOOP!
I don't see the problem when you must boot from a backup that "missed" 3 or 4 intermediate system updates.
Wonder if Apple is going to address this in any way next Tuesday? Not really a question for you; just wondering.I trust CCC far more than "Time Machine" - and despite all the comments on these forums and the "apple discussions forums" I have been able to make bootable back-ups for Catalina, Big Sur and Monterey along the way
As of Big Sur and Monterey the "system files" are locked - but - I have been able to make bootable clones on both Big Sur and Monterey - the only issue is that the macOS system is stuck at what ever version the 'Initial Clone" was done at - for example I just did an incremental back up on my BAK drive that was initialized at Monterey Beta 4 and have done multiple incremental back ups along the way (Monterey Beta 5 and Monterey Beta 6) 2 times a week that take about 1 to 2 min - very fast and no issues and have booted from the external back up many times to verify
The external drive boots fine with all the recent files and data - but - boots into macOS Beta 4 - this can be solved by booting from the clone and updating that "System" to the newer macOS - but I am not concerned that it has the very latest macOS version - as long as it boots fine and has all my recent data - which it does.
My suggestion is to get a working and bootable drive - preferably pick an empty drive - wipe it clean, format APFS, and make only 1 partition - then make a back up with CCC - if you do this you will not have to bother with the "Legacy Assistant" which I find confusing.
I have seen others post that installing the latest Big Sur or Monterey update on top of the clone to bring it up to date - but seems like too much work to me - it is really not that hard to wipe the destination drive once in while and make a complete new back up of the new upgraded system from scratch - especially if the target drive and the destination drive are both SSD's?
All that being said - I have been backing up 2 times a week (Clone) and never had a back up fail and always boots up fine with the most recent data and files - so CCC seems very reliable in my case and in fact is super fast
I also have a SSD backup (CCC) that boots .....just , for reasons I never investigated and don't mind, takes a few minutes / is rather slow in booting. Doesn't bother me as long as it comes up. Never bothered to check the Big Sur version but am sure it's probably doing the same as yours. Which I don't mind.I trust CCC far more than "Time Machine" - and despite all the comments on these forums and the "apple discussions forums" I have been able to make bootable back-ups for Catalina, Big Sur and Monterey along the way
As of Big Sur and Monterey the "system files" are locked - but - I have been able to make bootable clones on both Big Sur and Monterey - the only issue is that the macOS system is stuck at what ever version the 'Initial Clone" was done at - for example I just did an incremental back up on my BAK drive that was initialized at Monterey Beta 4 and have done multiple incremental back ups along the way (Monterey Beta 5 and Monterey Beta 6) 2 times a week that take about 1 to 2 min - very fast and no issues and have booted from the external back up many times to verify
The external drive boots fine with all the recent files and data - but - boots into macOS Beta 4 - this can be solved by booting from the clone and updating that "System" to the newer macOS - but I am not concerned that it has the very latest macOS version - as long as it boots fine and has all my recent data - which it does.
My suggestion is to get a working and bootable drive - preferably pick an empty drive - wipe it clean, format APFS, and make only 1 partition - then make a back up with CCC - if you do this you will not have to bother with the "Legacy Assistant" which I find confusing.
I have seen others post that installing the latest Big Sur or Monterey update on top of the clone to bring it up to date - but seems like too much work to me - it is really not that hard to wipe the destination drive once in while and make a complete new back up of the new upgraded system from scratch - especially if the target drive and the destination drive are both SSD's?
All that being said - I have been backing up 2 times a week (Clone) and never had a back up fail and always boots up fine with the most recent data and files - so CCC seems very reliable in my case and in fact is super fast
Thanks for the trials and the data!Update - after my post above #259 - I was curious about the build numbers not matching ( and I still feel it was a perfectly fine clone) - anyway - I was curious about the "Legacy Assistant" which I have been avoiding for no good reason and decided to use the Legacy Assistant to confirm the build numbers would be the same
After the new BAK with "Legacy Assistant" it automated what I was doing from time to time manually since Catalina - wiped the Drive - reformats to APFS and then does a complete BAK from scratch - result - it booted fine and now the destination clone has the same macOS build as the source (internal) - version 12.0 Beta (21A5506j)
My "take-away" is that I will continue the incremental back ups - except for when there is an macOS update - then i will do a "One Time" legacy assisted clone for the new macOS version
Just an update - FYI for anyone interested - see screen shot below for more detail
View attachment 1830046
Start up Disks
View attachment 1830048
Thanks for the trials and the data!
I also have a SSD backup (CCC) that boots .....just , for reasons I never investigated and don't mind, takes a few minutes / is rather slow in booting. Doesn't bother me as long as it comes up. Never bothered to check the Big Sur version but am sure it's probably doing the same as yours. Which I don't mind.
I formatted the external drive before kicking off CCC and clicked on for it to use the proprietary Apple thing but it seems to have copied less than a full clone , what am I doing wrong ?
I will retry its with 6. I was having issues with 6 and so went back to 5, wasn't as straight forward as using 5, but will try again. 6 also seemed slower at doing the copy than 5 ( seemed to take nearly double the amount of time).Looks like a difference of 57g between the source drive and destination drive? Did you try booting from the new back up to test it? check for a few recent files etc.?
Note: I always turn off my wifi / router when test booting a clone - so software does not get disabled and icloud does not start syncing etc
If you are on Catalina, Big Sur - I would upgrade to CCC version 6 - look like you are using CCC 5 ?
Nice avatar.I will retry its with 6. I was having issues with 6 and so went back to 5, wasn't as straight forward as using 5, but will try again. 6 also seemed slower at doing the copy than 5 ( seemed to take nearly double the amount of time).