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Re: First Look At Big Sur
joemikeb #56554 10/17/20 11:51 AM
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Originally Posted by joemikeb
Originally Posted by artie505
Mike's response to my question may be "quoted" as "Installing Big Sur on top of a CCC data clone and running Migration Assistant on top of a Big Sur installation yield the same results."
Agreed. But that does not mean you can clone or re-clone a data volume onto an existing Big Sur drive and end up with a bootable system.
Quote
artie: Can I install Big Sur on an external drive and keep it current by cloning my internal data volume to it regularly?

Mike Bombich: CCC will keep the Data-only volume current, yes. Nothing copies the System volume – not CCC, not Time Machine, nothing nor nobody can copy it (yet), not even Apple. The only way to restore the system right now is to reinstall it.
FWIW, I'd wait on this one. There is no impetus to upgrade to Big Sur, and there are some lower-level things that are still not working correctly. The biggest problem right now is that the "Signed System Volume" is supposed to be cryptographically "sealed", but that seal is constantly broken. A volume with a broken seal isn't supposed to be bootable, but Apple has relaxed that requirement because the functionality doesn't work. You're in no worse shape than in Catalina where the volume lacks the seal altogether, but then there's also no advantage (security-wise) to upgrading just yet.

and

artie: Will the external Big Sur installation be bootable after its Data-only volume has been updated by CCC?

Mike: That is my expectation, yes (it has remained bootable in my own tests).
It may be worth both your whiles for you to report your reverse prohibited symbol experience to Mike. (Broken/UNbroken seal issue, perhaps?)


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Re: First Look At Big Sur
artie505 #56561 10/17/20 05:24 PM
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Here is an interesting statement by Mike Bombich that appeared in the details of the most recent CCC upgrade:
"This update includes many changes to accommodate Apple's next OS, macOS "Big Sur". We were anticipating its release by now, but we're grateful that Apple is taking some additional time, hopefully to resolve some outstanding problems. If Apple ships Big Sur without resolving these problems, we'll call this update to CCC the "official" update for Big Sur. If Apple does resolve the outstanding problems, we'll post another update for Big Sur closer to the release date."


On a Mac since 1984.
Currently: 27" iMacs, Macbook Air, macOS 10.15.x,; iPhones, iPods and iPads galore!
Re: First Look At Big Sur
Ira L #56565 10/17/20 08:51 PM
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A new Apple Event is scheduled for November 17 and rumors have it that will be the announcement of the first Macs with Apple silicon. If that is true, then it would also have to include the release of macOS 11 (Big Sur) because macOS 10.x cannot run on Apple silicon. That only leaves 31 days for another Big Sur beta to be distributed and tested. Realistically I would not expect more than one more beta and that would be the Gold Master any changes after that would most likely remove any problematic features and hold those for a subsequent update version. I think the odds are in favor of the current CCC release being the official update for Big Sur. If I am wrong, it won't be the first time and it is highly unlikely it will be the last time.

Last edited by joemikeb; 10/17/20 08:53 PM.

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