In macOS
System Settings › Sound and the volume keys change the volume of your output device, so every app gets louder or quieter together. Some apps (Music, Spotify, browsers) have their own slider inside, but you have to find it in each app.
With Tuno
- 1
Download and open Tuno, then allow “System Audio Recording” when asked.
- 2
Click the Tuno icon in the menu bar. Every app playing sound appears with its own slider.
- 3
Drag an app’s slider to change only that app. Click its icon to mute it.
- 4
Optional: press ⌃⌥↑ / ⌃⌥↓ to change the volume of the app in front, ⌃⌥M to mute it.
macOS 15 or later, Mac with Apple silicon.
Frequently asked questions
Does Tuno remember each app’s volume?
Yes. The volume and mute state of every app are saved and applied again the next time it plays sound.
Can I make an app louder than 100%?
Yes, up to 150% or 200% depending on the setting in Tuno › General. This helps with quiet videos and calls.
Does it record my audio?
No. macOS calls the permission “System Audio Recording”, but Tuno only changes the level of the sound as it plays. Nothing is recorded or sent anywhere.
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