MixBar 0.1

First release.

A slider for every app that's making sound, in the macOS menu bar, plus one-click output switching.

Install: download MixBar-0.1.dmg, open it, drag MixBar to Applications. Signed and notarized by Apple, so it opens without a Gatekeeper warning.

macOS will ask once for permission to record audio. That permission is the mechanism: macOS has no per-app volume API, so the only way to change one app's volume is to capture its audio and play it back at a different level. MixBar never touches your microphone.

What it does

• Per-app volume and mute, remembered by app across restarts
• Live level meter drawn inside each volume bar
• Output device switching
• Three layouts: compact, comfortable, and a mixing-desk view

Design note

At default volume MixBar creates no taps and no aggregate device — it stays entirely out of your audio path until you actually move a slider, and leaves again the moment an app is back at 100%.

Requires macOS 15 or later.