At 3:38-4:00 in the session video, it seems Baek San Chang says that AudioDriverKit will not be allowed to be used for virtual audio devices... Keep in mind that the sample code presented is purely for demonstrative purpses and creates a virtual audio driver that is not associated with a hardware device, and so entitlements will not be granted for that kind of use case. For virtual audio driver, where device is all that is needed, the audio server plugin driver model should continue to be used. The mentioning of sample code is a little confusing; Does he mean the entitlements for hardware access won't be granted for a virtual device? That would seem obvious. But if he means the entitlements for driver kit extensions (com.apple.developer.driverkit and com.apple.developer.driverkit.allow-any-userclient-access) won't be granted for virtual audio devices, and this is why AudioServerPlugins should still be used, then that's another story. Are we allowed to use AudioDriverKit Extension for Virtual Devices? The benefit of having the extension bundled with the app rather than requiring an installer is a significant reason to use an extension if allowed.