How to Monitor Any USB Audio or Video Device on macOS

USB cameras, microphones, HDMI capture cards, and audio interfaces are supposed to “just work” on macOS. In reality, it’s often difficult to quickly access or monitor them without opening large and complicated software. https://medium.com/@chris.ahrweiler/how-to-monitor-any-usb-audio-or-video-device-on-macos-1feeac709bf3