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:
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?
Replies
The custom timer up to 24 hours is a really useful addition. I like that it actually puts the Mac to sleep instead of just stopping the timer.
Capsomnia
https://github.com/fuji-mak/Capsomnia/releases/tag/v3.0.0
I’d probably pick battery percentage cutoff next. It feels more practical for long downloads or overnight tasks.
Capsomnia supports anything from 1 to 24 hours, alongside preset duration.