Soundflower is a MacOS system extension that allows applications to pass audio to other applications. Soundflower is easy to use, it simply presents itself as an audio device, allowing any audio application to send and receive audio with no other support needed. ~ code.google.com

Downloads:

• code.google.com/archive/p/soundflower/downloads
• github.com/RogueAmoeba/Soundflower-Original
• github.com/mattingalls/Soundflower

Tutorials:

• wiki.elon.edu/display/TECH/Soundflower
• www.wikihow.com/Record-Application-Audio-With-Soundflower