One of the apps that stopped working on my system due to the "full security" setting as Airfoil, a utility I use to direct sound from my iMac. It relies on a system extension, which is now working again thanks to excellent support from the developer, who send me the following "patch" (their code is removed for privacy reasons). Using Terminal in recovery mode: Once I implemented the fix as described, their audio system performed as before. Their VENDOR ALPHANUMERIC CODE was a 10-digit one.
spctl kext-consent add (CODE, no parentheses)
You'll need to boot into Recovery to run the command, but to take a step back and explain each portion of the command:
- the spctl command controls the security policies of your Mac,
- the kext-consent subsystem manages the ability for developers to add and manage kernel extensions on your Mac. While our component is not a kernel extension, as a system audio extension the install mechanism is the same, and
- our developer team, has a unique identifier with Apple, which allows and restricts the use of our software.
I have asked other vendors for their Apple identifiers, hopefully those apps will be working again soon.