MonitorControl: External Display Brightness and Volume Control, Finally Native

Ever tried to adjust the brightness on an external monitor from your Mac? You probably reached for those tiny, awkward physical buttons on the monitor bezel. Or worse, you downloaded some clunky third-party app that didn't work half the time.

MonitorControl fixes that. It gives you native OSD (on-screen display) and keyboard control over external display brightness and volume. No guesswork, no extra clicks.

What It Does

MonitorControl lets you adjust brightness and volume on external monitors — the same way you do on your MacBook's built-in display.
It uses the DDC/CI protocol (over USB or HDMI/DP) to send commands directly to your monitor.
The result? Your brightness keys and volume buttons just work, even on external hardware that Apple doesn't natively support.

Why It's Cool

• Keyboard shortcuts work out of the box — F1/F2 for brightness, F10/F11/F12 for volume (or whatever keys you've mapped).
• Native OSD — You get that smooth, macOS-style overlay showing brightness or volume changes, not a separate window.
• Sync option — Automatically match brightness with your built‑in display if you want.
• Monitor-specific controls — Adjust individual external monitors independently.
• No more panel menus — No more hunting through OSD menus on your Dell or LG just to dim the screen.

It's open source, actively maintained, and supports both Intel and Apple Silicon Macs. There's also a CLI tool (brightness and volume commands) if you want to script it.

How to Try It

The easiest way:

1. Head to the MonitorControl GitHub releases page.
2. Download the latest .dmg file.
3. Drag the app to your Applications folder.
4. Launch it. It'll ask for accessibility permissions (needed for keyboard shortcuts).
5. That's it. Start pressing your brightness keys.

If you prefer Homebrew:

brew install --cask monitorcontrol

No crazy configuration. It just works.

Final Thoughts

This is one of those tools that feels like Apple should have built years ago. If you work on a Mac with an external monitor, especially a non-Apple one, it's a massive quality-of-life improvement. No more squinting or reaching behind the monitor.
For developers, the CLI means you can hook brightness adjustments into your scripts (day/night modes, anyone?). It's simple, reliable, and free.

Give it a try. Your fingers will thank you.

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