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Title quotes Dave Nanian at SuperDuper (who paraphrases Dr. Suess!) and writes that a new bug from Apple will prevent replicating MacOS and eliminate bootable drives.
I saw this on Gruber, who quotes:
Apple broke the replicator. Towards the end of replicating the Data volume, seemingly when it's about to copy either Preboot or Recovery, it fails with a Resource Busy error.
In the past, Resource Busy could be worked around by ensuring the system was kept awake. But this new bug means, on most systems, there's no fix. It just fails...
Since Apple took away the ability for 3rd parties (eg, us) to copy the OS, and took on the responsibility themselves, it's been up to them to ensure this functionality continues to work. And in that, they've failed in macOS 15.2.
Because this is their code, and we're forced to rely on it to copy the OS, OS copying will not work until they fix it.
It's been argued that we should not bother to clone the OS, and that just cloning the data is all that matters. This is a function of the Sealed System Volume and is Apple's way of discouraging cloning. It may be that this is a feature, not a bug, as far as Apple is concerned.
With Gruber flaggiing it, Apple cannot really hide. We shall see.
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I haven't heard anyone mention Super Duper in a long time....
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The good news though... is that the restore from volume after clean install seems to work pretty flawlessly these days? It least it did for my Sierra to High Sierra upgrade, everything just like I left it on last boot from Sierra (wait, it's not 2017...?)
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Super Duper had its place in Mac OS lore… about 20 years ago. For those who still hold onto hope that
Moto chips will once again rule the Macscape, this might just be an omen…
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numbered,
Someone posted about this yesterday and the day before. It's definitely unwelcome. However, all is not lost. I put together a way to do a "pseudo clone" of a system. It requires three drives and more work. However, it gets the job done.
I'm using this method to "clone" systems that Carbon Copy Cloner can't clone in the previous manner.
Robert
P.S. BFD, not sure what you mean. Cloning still serves a useful purpose. Possibly even more so now that a machine becomes a paperweight in the event its internal drive fails.
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In a way, I do miss the world of bootable backups BUT the fact is that I haven't needed one in a VERY long time.
The only way this change makes sense to me is that this addresses some encryption / security concerns.
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I haven't tested clones under 15.2, myself...
I've seen in various forums reports that CCC 6 and 7 both worked to produce bootable clones from macOS 15.2... AND reports that it failed.
And now there are reports that Time Machine is failing under 15.2...
https://9to5mac.com/2024/12/19/macos-15-...-and-more/
One or more backup bugs in macOS 15.2 Sequoia is affecting Apple’s own Time Machine utility, as well as third-party apps SuperDuper and CarbonCopyCloner.
Initially the problem appeared to affect bootable backups only, but it now appears that it is either more general than this, or there is more than one bug affecting Mac backups …
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mattkime wrote:
In a way, I do miss the world of bootable backups BUT the fact is that I haven't needed one in a VERY long time.
The only way this change makes sense to me is that this addresses some encryption / security concerns.
This is true for me as well. Though, there are limited situations where it would be helpful to have a bootable clone of a system while troubleshooting.
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Matt and Clay,
For me, a bootable clone is as much about having a backup of my machine as it is for reducing downtime. Restoring a Mac fro9m a Time Machine backup can be time consuming. That's an issue if you need your machine in proper working order in a timely manner. Clones allow this. You can't say that about restoring from a Time Machine backup.
Robert
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Does anybody need to hear me say it one more time. No.
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