Unable to install macOS Sonoma 14.4?

If you're unable to install macOS Sonoma 14.4 update (released today, 7 March 2024) then make sure the SecureBootModel is set to Disabled (instead of Default). After Sonoma has updated successfully, you can change SecureBootModel back to Default if you wish.

config.plist → Misc → Security → SecureBootModel = Disabled