How to Get a Volume Mixer on macOS: Per-App Audio Control Like Windows

Why Mac Volume Control Gets Disabled When you connect external speakers or an HDMI monitor with built-in audio to your Mac, you might notice the volume controls become greyed out or completely unresponsive. This isn't a bug — it's actually macOS handing over audio control to the external device. The problem is that many external speakers, monitors, and HDMI devices don't properly communicate their volume capabilities back to macOS. Your Mac essentially says "the external device will handle volume control" but the device doesn't actually provide that control. Method 1: Check Your Audio Output Settings First, verify which audio output macOS is actually using: Hold Option and click the volume icon in your menu bar Look at the output device list If you see multiple options for your external device, try switching between them Some devices show up as both "HDMI" and "External Speakers" — test both Many users find that one output option allows volume control while another doesn't. Method 2: R