Soundflower

If you set your System Output to "Soundflower (2ch)," any sound your Mac makes (YouTube videos, Zoom calls, system alerts) is sent into the Soundflower bridge.

Download the installer package (usually a .dmg file) from a reputable source. The original project by Cycling '74 is no longer maintained, but the code has been forked. The most stable modern version is often found on GitHub repositories maintained by developers like mattingalls . soundflower

If you are running macOS 10.14 or older, Soundflower can be helpful. If you are running macOS 10.15 or newer, use BlackHole instead for the same functionality without compromising system security. If you set your System Output to "Soundflower

: Acts as a bridge between two software programs. soundflower

Open the package and follow the standard installation prompts.