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No install entry in Open Core menu upgrading BS beta to release version.

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If you have recently attempted to update Big Sur from beta to release version 11.0.1 using the full installer you may have encountered a missing install entry in the Open Core boot menu after the first reboot.  In this situation it was still possible to boot into the beta version.  Clearing the nvram and multiple reboots did not solve the problem.  
If this is your situation reboot into recovery mode and dsikutil list your boot drive and look to see if your Big Sur snapshot volume is approximately twice the normal size.  Run:


bless --folder /Volumes/x/System/Library/CoreServices --bootefi --create-snapshot


where x is the name of your Big Sur volume.


Reboot and once the desktop is initialized the installed version should be 11.0.1 (20B29).


Note that you may have to change csr-active-config in Open Core config if some kexts did not load.


Could someone please post the correct 20B29 OC csr-active-config to disable kext checking/SIP.

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