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How do I repair permissions and rebuild the cache - Big Sur


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Big Sur brought significant changes to the way kexts operate with the kernel and further tightened filesystem protection. It's now most difficult for anyone to make any changes to /S/L/E folder. As such, kexts should be considered cacheable only from /L/E.

 

To repair permissions after any any kext addition, removal or modification in /L/E, type the following Terminal commands:

sudo chmod -Rf 755 /L*/E*
sudo chown -Rf 0:0 /L*/E*
sudo touch -f /L*/E*

`

To rebuild the cache, type the following Terminal commands

sudo kextcache -i /          -> will invoke the required kmutil command
sudo kcditto

 

For additional information on the commands:

man kmutil
man kcditto

 

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