avconferenced

avconferenced is an Apple background process, part of the private AVConference framework that powers FaceTime audio and video and the call plumbing other apps borrow. You normally never see it. It surfaces in two places: Activity Monitor, when you go looking for what is keeping the orange microphone dot lit, and the Console, where its log lines mention audio devices and call sessions.

Seeing it does not mean something is spying on you. macOS routes several ordinary call features through it, so a lingering FaceTime window, a Continuity handoff from an iPhone call, or an app using Apple's call APIs can all leave it active. Quitting it is not useful: launchd restarts it immediately. Closing the app that actually started the call is what releases the microphone.

The reason avconferenced confuses people is that macOS historically only told you that *something* was recording, never what. Since macOS 14.2 there is a real API that names the process holding the mic, which is what Mac Note Taker uses to suggest recording the moment a meeting starts.