Fix blackhole-2ch on MacOS – Could not kickstart service “com.apple.audio.coreaudiod”: 1: Operation not permitted
Recently I received this error while upgrading or uninstalling blackhole-2ch via brew: Could not kickstart service “com.apple.audio.coreaudiod”: 1: Operation not permitted This was fixed by the following: Another option seems to be to fix the issue with kickstart as described here. But I didn’t try that.