Adobe Premiere Pro - Focusrite RED4Pre - Surround Sound Monitoring - Grad Suite CMB 4.112A

>Apple System Preferences

>Sound

Set Output to Focusrite Thunderbolt

Open Audio MIDI Setup

Click on HDMI > Output and make sure

The Source is Focusrite Thunderbolt

click on Configure Speakers

Make sure they are set to 5.1 Surround


Apply > Done

Open Premiere Pro