The IOUserAudioDevice::SetTransportType() function is what generally sets that icon for your device.

For those of you looking at this with the same problem, the answer was to add: <key>com.apple.security.temporary-exception.iokit-user-client-class</key> <array> <string>IOUserUserClient</string> </array> to the application's entitlement file. Apple is still trying to figure out why the example code didn't work "out-of-the-box". Thanks!

Care to share some example source on how you were able to do that? I am also using IODMACommand. However if the IOBufferMemoryDescriptor::inTaskWithPhysicalMask has the physicalMask set to 0xFFFFF000 (32 bits) then inTaskWithPhysicalMask fails and it wouldn't matter what IODMACommand does since you can't get there.

I am having a similar issue with IOBufferMemoryDescriptor::inTaskWithPhysicalMask. It seems like inTaskWithPhysicalMask does not allow the physicalMask to restrict the output address to only 32-bits on an M1 based mac. If I change the physicalMask to be 0xFFFFFF000 (>32 bits) then the inTaskWithPhysicalMask succeeds but now the hardware has an issue with the 64-bit addressing. Also, it would seem that setPreparationID is for user mode code, not Kernel. Have you found a way round this?