If you use a Dell monitor with a MacBook (M1/M2/M3), you know the pain:
- Brightness keys only affect the MacBook
- External monitor stays blinding
- Popular apps are laggy or broken on Apple Silicon
So I built a fix.
What it does
A tiny CLI tool that automatically syncs your Dell monitor brightness with your MacBook — smoothly, in real time, no UI.
Runs silently in the background. Set once, forget forever.
One-command setup
bash <(curl -sL https://raw.githubusercontent.com/kushkamisha/dell-brightness-sync/main/install.sh)
Or run instantly:
npx @mkushka/dell-brightness-sync
How it works
- Reads actual Mac brightness via
corebrightnessdiag - Controls Dell monitors via hardware DDC/CI (
m1ddc) - No Electron, no accessibility hacks, no permissions hell
Links
- GitHub: https://github.com/kushkamisha/dell-brightness-sync
- npm: https://www.npmjs.com/package/@mkushka/dell-brightness-sync
Open-source. MIT. Built because I was annoyed 😄
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