A sidebar for macOS

Group your apps the way you group your work.

Cosm is a workspace manager for macOS. Put the apps for one project in one space — switch contexts with a single click. One window in focus, the rest out of sight.

Requires a Mac running macOS 15 (Sequoia) or later — Apple silicon or Intel. Accessibility is the only permission Cosm asks for — it’s how the sidebar switches windows. What it’s for, and how to install →