Capsomnia

What it does

Capsomnia turns Caps Lock into a physical switch that keeps your MacBook awake. Keep Claude Code, Codex, other AI agents, SSH sessions, builds, downloads, and more running after you close the lid. If Caps Lock is already assigned, choose another shortcut. The Caps Lock light still shows whether Capsomnia is active. The app is free and open source, signed and notarized. No accounts or telemetry. We’ve already seen strong interest in Japan: 2.3M+ views and 6,000+ downloads.

Capsomnia turns Caps Lock into a physical keep-awake switch for closed-lid MacBook background work. Run Codex, Claude Code, SSH sessions, builds, and unattended scripts without sleep.

Caps Lock becomes a physical keep-awake switch. Flip it on, close the lid, and let your background work keep running. macOS 14+ · Open source · 2.5M+ views on X · 10,000+ downloads Flip Caps Lock on, close the lid, and let long-running local work continue. Capsomnia keeps your MacBook awake until you turn it off. The Caps Lock LED shows the sleep-prevention state at a glance. Keep long Codex or Claude Code tasks running with the lid closed. Drive your Mac remotely without it dropping into sleep mid-session. Keep Codex Mobile and other mobile sessions connected so work does not stop. Capsomnia is a small Mac app focused on closed-lid continuity, physical status visibility, and transparent…from capsomnia.com

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