Deleting "com.apple.developer.driverkit.userclient-access" should clear this issue. That helped indeed for the compiling, thank you! The Driver Communication example runs but doesn't connect though. [object Object] And in the log: extension category returned error I wonder now if I should bother fixing the example or moving on to adapting the SimpleAudio example. Unfortunately I don't know where to start, I am a C++ developer by trade, the macOS specific toolchains are new to me. Thanks again!

Thank you for the information. First off, the example "Communicating between a DriverKit extension and a client app" notes as first step in the README to disable SIP, so is this nor necessary or not? When building the Communicating example, I get the same error as above though, saying "Automatic signing failed, please file a bug report" and the entitlement says: "com.apple.developer.driverkit.allow-any-userclient-access entitlement missing" Where do I find this entitlement? Thanks again