Lower app volume on Mac without muting everything

Start with the simplest test: does the noisy app have its own volume slider? Many media apps, browsers, meeting apps, and players do. If that slider fixes the problem, stop there. If one app needs a lower level while the rest of the Mac stays normal, use per-app volume.

TeenySound is built for that second case. It shows apps that are producing audio, gives each one its own 0 to 100 percent slider, supports app mute, can mute all controlled apps, restores prior levels, and can route apps to selected output devices. Use it when system volume is too broad.

This is the TeenySound spoke for the TeenyApps hub Mac writing workflow setup for clipboard and audio. Pair it with Mac clipboard manager for code snippets and URLs when a writing or review session depends on both copied context and controlled sound.

Quick decision table

01Check the output before blaming the app

Apple's Sound settings control the selected output device, output volume, alert volume, and related sound behavior. If the wrong device is selected, a per-app mixer will not make the room sound right. Pick the real output first: internal speakers, headphones, display speakers, USB audio, AirPlay, or another connected device.

Then test the source. Play the browser tab, video, clip, call, recorder, or music app that needs adjustment. If every app sounds wrong, fix system output. If one app is wrong, move to app-level controls.

02Use the app's own volume when it exists

The app's own volume control is usually the best first adjustment. It is visible to that app, survives in the way that app expects, and does not require another utility.

Use TeenySound when the app control is missing, buried, inconsistent, or not enough for the session. A common writing example: keep music low, play a browser clip at normal level, and silence a chat app without lowering the whole Mac.

The key is scope. System volume changes the room. App volume changes one source.

03Lower the app in TeenySound

1. Start audio in the app you want to control.
2. Open TeenySound from the menu bar or with the popover shortcut.
3. Find the app row in the mixer.
4. Move its slider down until it fits the session.
5. Use the app mute button if the app should stay silent.
6. Use reset to full when the app should return to 100 percent.

The local Swift source matches that workflow. The mixer view shows a system volume card, then app rows. Each app row gets volume change, mute, reset, hide, output-device, and per-device-volume actions. The view model sends app slider changes to the per-app audio manager, which clamps volume between 0 and 1 and applies it through the audio engine.

04Mute one app, mute all, or restore

Lowering an app is not the same as muting it. Use a lower level when the app still belongs in the session. Use app mute when the app should stay present but silent. Use mute-all when you need every controlled app quiet for a short period.

TeenySound keeps pre-mute app volumes so unmuting can restore a useful level instead of forcing you to rebuild the mix. The mute-all path also has a restore-all action. That makes it better for temporary quiet than dragging every slider to zero.

For the focused shortcut version, read Mute all Mac apps with one keyboard shortcut.

05Know the limits

Per-app volume only helps audio that is actually flowing through the Mac. If an app is casting to a remote device, or if the app has its own separate audio route, the local mixer may not see the final output path you expect.

TeenySound also needs macOS support for Apple's Core Audio tap path. Its homepage says macOS 14.2 or later is required. The app explains Screen & System Audio Recording permission because the feature needs access to outgoing app audio for volume adjustment.

Use it as a practical mixer, not as a studio tool. It is for everyday app levels, mute, restore, and routing. It is not an equalizer, compressor, recording editor, or replacement for the system Sound pane.

Common questions

Can I lower the volume of one app on Mac?

macOS Sound settings control the output device and system volume. For separate app levels, use an app-level control if the app has one, or a per-app volume utility such as TeenySound when the audio is playing through the Mac.

When should I use per-app volume instead of system volume?

Use per-app volume when one source should stay audible while another app stays low or muted. Use system volume when the whole Mac should get louder or quieter together.

Does lowering app volume change the app forever?

TeenySound stores app volume by bundle ID and can restore prior levels after mute-all. Review the mixer before assuming a quiet app is broken.

Sources checked

• TeenySound claims were checked against the TeenySound homepage and local Swift source for per-app sliders, app mute, mute-all, restore-all, reset-to-full, app hiding, output routing, device-specific volume memory, shortcuts, permissions, and macOS 14.2 requirements.
• Apple Support: Change the sound output settings on Mac.
• Apple Support: Change Sound settings on Mac.
• Apple Developer Documentation: Capturing system audio with Core Audio taps.