Mute all Mac apps with one keyboard shortcut

The short answer: TeenySound uses Option-Shift-A by default to mute all app audio it controls. Press it again and TeenySound restores the prior per-app volumes. That is the difference between "make the Mac quiet" and "throw away my mix."

This matters if your Mac has more than one sound source. Music can be loud, a browser tab can start talking, a meeting app can keep its own level, and notifications can cut through at the worst time. System mute handles the emergency. A per-app mute-all shortcut handles the cleanup without losing the shape of your audio setup.

This article is the TeenySound spoke for the Mac workday reset checklist. The matching clipboard spoke is clear clipboard history on Mac. One clears copied state. The other clears noisy app state.

Quick decision table

01Know what system mute does

Apple's Sound settings give the Mac a selected output device, output volume, alert controls, and a Mute checkbox. Keyboard shortcuts can also take actions quickly. That is the baseline and it is often enough.

System mute is still a device-level switch. It does not know that Music was meant to stay at 80 percent, Safari at 35 percent, Slack at 20 percent, and a meeting app at 60 percent. If you rely on per-app levels, system mute quiets the result but does not manage the mix.

That is why a mute-all shortcut can be better at the end of a work block. You are not choosing a new system output setting. You are telling every app to go quiet while preserving the prior per-app volumes for later.

02Use Option-Shift-A for mute-all

teenysound seeds Option-Shift-A as the default mute-all shortcut on first launch. The homepage describes the flow plainly: press Option-Shift-A and every app goes silent; press again and all volumes return exactly where they were. The source uses the same default key and modifier constants.

Under the hood, the app stores each app's current volume before muting. The per-app audio manager keeps a preMuteVolumes dictionary, sets each app volume to zero, marks the app muted, and tells the playthrough engine to mute that bundle ID. Restore runs the opposite path and reapplies the stored volume.

The setting is not locked. TeenySound's hotkey manager reads the configured key code and modifiers from user defaults, and the Settings screen lets you record another shortcut or clear it. Keep a modifier-heavy shortcut. A bare letter is a bad global shortcut because it steals normal typing.

03Use Option-Shift-S for the mixer

TeenySound also seeds Option-Shift-S as the default mixer shortcut. That is the slower but more precise path. Use it when you need to lower one app, hide a noisy app, change a route, or check which app is actually producing sound.

Think of the two shortcuts as a pair. Option-Shift-A is the emergency brake. Option-Shift-S is the control panel. If you only need quiet, mute all. If you need to understand the sound source, open the mixer.

The mixer view is also where per-app mute still matters. If one browser is noisy but the rest of the Mac should keep playing, muting all is too broad. Open the mixer, mute the one app, and leave the rest alone.

04Restore instead of rebuilding the mix

The important part of mute-all is the second press. A normal global mute is binary. TeenySound restore is stateful.

The source restores all apps to their pre-mute volumes, clears the temporary pre-mute map, persists the restored volumes, and updates the engine. That means a careful mix can survive interruption. Browser low, music high, meeting app clear, notifications quiet. Mute the whole stack for a call, then bring back the stack without dragging four sliders.

There is still a practical limit. If an app exits while muted, it may return later with its saved default or device-specific volume. That is reasonable. Restore is for the apps TeenySound is actively managing at that moment.

05Use it as a workday reset

A mute-all shortcut is especially useful at two times: before a sensitive block and at the end of a work block.

Before a call, recording, focus session, or screen share, mute-all catches the app you forgot about. At the end of the day, it keeps tomorrow from starting with a browser video, music app, or notification source still hot from today's setup.

That does not mean every day should end muted. If you have a stable desk setup and the same audio mix should survive tomorrow, restore it. The point is control, not silence as a ritual.

Setup checklist

1. Install TeenySound and approve the system audio recording permission if you want per-app audio control.
2. Press Option-Shift-S to open the mixer and confirm active audio apps appear.
3. Set the per-app levels you actually want.
4. Press Option-Shift-A to mute all app audio.
5. Press Option-Shift-A again to restore the prior levels.
6. Change the shortcut in Settings if Option-Shift-A conflicts with another app.

If the permission prompt is the blocker, read why Mac volume apps ask for system audio recording first. If the problem is device routing, read route Mac app audio to different outputs.

Common questions

Can I mute all Mac apps with one keyboard shortcut?

Yes. TeenySound uses Option-Shift-A by default to mute every app it is controlling, then uses the same shortcut to restore the prior per-app volumes.

Is mute-all the same as system mute?

No. System mute controls the selected output device. TeenySound mute-all is a per-app audio shortcut that stores each app's prior volume so the mix can be restored.

Can I change the TeenySound mute-all shortcut?

Yes. TeenySound seeds Option-Shift-A on first launch, but the shortcut can be changed or cleared in Settings.

Sources checked

• TeenySound claims were checked against the TeenySound homepage and local Swift source for mute-all, restore-all, default shortcuts, mixer shortcut, hotkey registration, and per-app volume state.
• Apple Support: Change Sound settings on Mac.
• Apple Support: Intro to Mac keyboard shortcuts.
• Apple Developer Documentation: Capturing system audio with Core Audio taps.