Stop macOS sending audio to your monitor’s speakers
Updated 2026-09-14
You dock your laptop, or plug in a USB-C cable to charge something, and the sound moves to your monitor's speakers — which are usually the worst speakers in the room. Nothing about the display changed except that it introduced itself.
Why a monitor counts as an audio device
Displays connected over HDMI, DisplayPort or USB-C carry audio as well as video. As far as macOS is concerned a monitor with speakers is an output device like any other, and it appears in your Sound settings the moment it connects.
macOS has one rule for choosing your audio device: whatever connected most recently wins. There is no notion of preference, and no way to tell it that one device matters more than another.
So the display does not have to be better, louder, or chosen. It only has to be newest.
Why docking makes it constant
If you undock and redock daily, the display becomes the most recent device every single morning. That is why this feels worse than a one-off annoyance — the rule re-fires on every reconnection, and you correct it by hand every time.
USB hubs and Thunderbolt docks add their own audio devices to the mix, so a single cable can introduce two or three candidates at once.
What you can do without extra software
Some monitors let you disable audio out in their own on-screen menu. If yours does, that removes it from the list entirely and is the cleanest native fix.
Otherwise, Option-click the Sound icon in the menu bar to switch back in one click, rather than opening System Settings each time.
There is no macOS setting that says "never use this device". Devices cannot be hidden or deprioritised from the Sound pane.
The fix that survives docking
The reliable answer is a ranked list where your monitor sits at the bottom or is excluded, so connecting it changes nothing.
Tunestack re-evaluates that list every time a device appears or disappears, which is exactly the moment the problem occurs. Dock the laptop and your audio stays where you put it.