PhoneRefX — Mac Bridge

This installs what's needed to stream your Mac's audio to the PhoneRefX app on your phone over the USB cable:

• PhoneRefX audio device — a virtual output you select in your DAW or Mac sound settings.
• PhoneRefX Bridge — captures it and streams to the phone (runs automatically in the background).

After installing: set your Mac output (or a DAW aux) to PhoneRefX, open the app on your phone, slide it on — you'll hear your mix on the phone speaker, live.