Big Sur kext update

Big Sur kext update.md

• Find your System volume:

diskutil list
/dev/disk5 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +255.7 GB   disk5
                                 Physical Store disk4s2
   1:                APFS Volume ⁨Big Sur HD - Data⁩       122.5 GB   disk5s1
   2:                APFS Volume ⁨Preboot⁩                 309.4 MB   disk5s2
   3:                APFS Volume ⁨Recovery⁩                887.8 MB   disk5s3
   4:                APFS Volume ⁨VM⁩                      1.1 MB     disk5s4
   5:                APFS Volume ⁨Big Sur HD⁩              16.2 GB    disk5s5
   6:              APFS Snapshot ⁨com.apple.os.update-...⁩ 16.2 GB    disk5s5s

• Mount the drive(ie. disk5s5):

sudo mount -o nobrowse -t apfs  /dev/disk5s5 /System/Volumes/Update/mnt1

• Remove the old kext:

sudo rm -R /System/Volumes/Update/mnt1/System/Library/Extensions/IOPCIFamily.kext

• Copy over your kext (change desktop to whether you have the 11.2.3 kext):

sudo cp -R ~/Desktop/IOPCIFamily.kext /System/Volumes/Update/mnt1/System/Library/Extensions/

• Fix permissions:

sudo chmod -Rf 755 /System/Volumes/Update/mnt1/System/Library/Extensions/IOPCIFamily.kext
sudo chown -Rf root:wheel /System/Volumes/Update/mnt1/System/Library/Extensions/IOPCIFamily.kext

• Rebuild kernel cache with 11.2.3's IOPCIFamily:

sudo kmutil install --volume-root /System/Volumes/Update/mnt1/ --update-all

• Create new bootable snapshot:

sudo bless --folder /System/Volumes/Update/mnt1/System/Library/CoreServices --bootefi --create-snapshot

Ok how I can remove that snapshot? And undo bless --folder action?

https://lemp.io/how-to-delete-snapshots-in-mac-os/