Unlike Windows, macOS does not have a native "Stereo Mix" feature for internal audio recording. You'll need a "virtual cable" to bridge the gap. How to Record Internal Audio on Mac? - Apple Community
Recording audio on your computer typically brings to mind a microphone, but what if you want to capture the crisp, digital sound of a YouTube video, a live stream, or a gameplay session without external noise interference? You can bypass the microphone entirely by using internal "loopback" methods to record the system audio directly. 1. Windows: The "Stereo Mix" and WASAPI Methods record sound on the computer without microphone
Right-click an empty area, select , and if Stereo Mix appears, right-click to Enable it. Unlike Windows, macOS does not have a native