Nocturnal

Nocturnal is a macOS utility that lets users switch the system appearance between light and dark modes with a single click. The app places an icon in the menu bar; clicking the icon immediately toggles dark mode, and the application can be removed from the menu bar by dragging the icon out while holding the command key. It requires macOS 10.14 Mojave or newer and is distributed as a stable release under the MIT license.

The tool is intended for anyone who wants a quick, manual way to change the OS theme without navigating system preferences. Installation can be performed by downloading the latest release from the project’s GitHub page or via Homebrew Cask, simplifying deployment for users familiar with either method.

Developed by Harshil Shah, Nocturnal focuses on minimalism and ease of use, offering a single‑click toggle without additional configuration or background services. The source code and licensing information are publicly available, allowing users to inspect or modify the app as needed.