Capsomnia 3.0.0: automatically sleep your Mac when the timer ends

A recurring question during our Product Hunt launch was: “What if I forget Capsomnia is still keeping my Mac awake?”

Today I’m shipping the first answer: an optional auto-off timer in Capsomnia 3.0.0.

Choose 15 or 30 minutes, 1, 2, 4, or 8 hours—or any custom duration from 1 minute to 24 hours. When time runs out, Capsomnia:

1. turns Caps Lock off,

2. confirms that macOS sleep prevention is disabled,

3. puts the Mac to sleep.

I kept the original concept intact: the menu bar remains a tiny LED, while timer controls live in Advanced Settings.

This is time-based safety—not battery- or temperature-aware behavior yet. Because expiry intentionally puts the Mac to sleep, please save your work before using it.

The update is free, open source, signed, and notarized:

https://capsomnia.com/

A big thank-you to Vivek Advani for contributing the original timer implementation on GitHub.

What should come next: a battery-percentage cutoff or temperature-aware controls?