No Carbon Copy Cloner Legacy bootable disk with Sonoma on Silicon

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No Carbon Copy Cloner Legacy bootable disk with Sonoma on Silicon

Just tested using Carbon Copy Cloner to make a bootable drive with Sonoma using the app Legacy feature. It no longer works. I found after copying all data to a new drive you need to boot up into recovery mode and then install the OS onto the external drive. Then it will boot but also has issues with authentication. It appears the day of the external bootable drive is almost dead (if not already). Makes no difference what the security settings are in the recovery utilities menu. Last time I got this work correctly was with Ventura. Still works OK on Intel Mac.

Mac Studio (2022)

Posted on Nov 9, 2023 5:14 PM

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Answer 1

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tbirdvet Author

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Nov 10, 2023 5:16 AM in response to tbirdvet

Issue resolved for Silicon Macs. After reading more at CCC web site the process has to be as follows:

Using CCC to clone your data to the external drive but do not use the Legacy bootable feature
Boot into recovery mode and reinstall the OS on the cloned external drive. Takes about 20-25 minutes
The Mac will then reboot using the external cloned drive. There are no authentication issues.
You can then use the startup drive menu from the preference pane in the future

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Answer 2

Nov 10, 2023 6:14 AM in response to tbirdvet

I use SuperDuper! to clone bootable drives; CCC for Time Machine-like backups because it's far more versatile.

SD! is simple and straight forward and has never failed to make a bootable clone.

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Answer 3

tbirdvet Author

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Nov 10, 2023 4:13 PM in response to mrokloricred37

yes. You would need to erase your internal drive then install the OS then migrate from your external. Not sure why you would need to do this very often. I make external boot drives to test a new OS before I update my internal drive

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Answer 4

Nov 10, 2023 3:47 PM in response to tbirdvet

Thanks for your great help.

You would still need to migrate the external drive to the internal drive (if that is the users intent), right?

The internal drive would need to be erased at the "parent" Apple SSD level first?

Are there any issues with this?

Thanks

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Answer 5

Nov 10, 2023 4:32 PM in response to tbirdvet

Must the OS be installed on the internal drive first and then migrate?

It seems that in your case CCC was cloned to the external drive first and then OS was installed from recovery mode.

So you couldn't clone an external drive to an erased internal drive and then install the OS to the internal drive from recovery mode?

Yes, it would rarely be done and I'd sure the external drive was working appropriately first !!

Thanks

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Answer 6

tbirdvet Author

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Nov 10, 2023 11:54 AM in response to stumpy1946

Did you test with Sonoma? I believe CCC started having issues with Ventura as all worked easily with Monterey and prior with any M mac.

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Answer 7

tbirdvet Author

Level 6

17,060 points

Nov 11, 2023 4:06 PM in response to mrokloricred37

Yes You could clone external to internal then boot from external and then load OS on the internal

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Answer 8

Nov 11, 2023 8:58 PM in response to tbirdvet

Thanks again for your continued expert help.

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