DarkModeBuddy

DarkModeBuddy runs continuously in the background on macOS and monitors the built‑in ambient light sensor that also controls screen brightness. When the measured light level stays below a user‑defined threshold for a configurable period, the app switches the system appearance to Dark Mode; when the light rises above the threshold, it returns to Light Mode. This behavior avoids the flickering that can occur with rapid changes in illumination.

The tool is aimed at Mac users who want their interface theme to reflect actual lighting conditions rather than the time‑based “Auto” mode provided by macOS. It is useful for anyone who works for the Mac in varying environments and prefers the visual comfort of a theme that matches the surrounding light.

DarkModeBuddy requires macOS Catalina or later and a Mac equipped with an internal ambient light sensor; external displays are not supported. The application is stable, open‑source, and distributed for free, with optional donations to support development.