Capsomnia

the thermal question already came up and the honest "left to macOS" answer is a bit concerning given the use case. specifically curious about fanless machines - on a MacBook Air with no active cooling, would you actually advise against closing the lid for a long Claude Code or build run, versus a MacBook Pro that can at least move air internally? feels like the risk profile is pretty different between the two and worth calling out explicitly until the thermal-aware roadmap item ships

Love it, want it, using it!

Ha, I love little utilities like this that do one thing well. My laptop going to sleep mid download has ruined more evenings than I want to admit. Congrats on the traction in Japan by the way, 2.3 million views before even launching here is wild. Does it play nicely with clamshell mode when an external display is connected?

Using the Caps Lock light as the status indicator is genuinely clever hardware reuse, no menu bar clutter needed. Also nice that it is signed, notarized and makes zero network requests. Any plans for the battery safety cutoff to kick in automatically when running on battery below a certain percentage?

I need this. 😅

Brilliant repurposing of the most neglected key on the Mac keyboard, and using the Caps Lock light as a live status indicator is a genuinely clever touch.

clever repurposing of caps lock, but I'd worry about thermal buildup with the lid closed and vents blocked for a long build or training run. have you tested how hot these get compared to running with the lid open, and is there any thermal throttling safeguard built in or is that left entirely up to macOS?

For me it would be Claude Code running a longer refactor or migration task overnight on Tellacity, since those are the runs that take twenty or thirty minutes and I don't want to babysit the laptop lid open the whole time just to keep it from sleeping.
The thing I'd want clarified before trusting it though is what happens if the battery gets critically low while keep awake mode is on with the lid closed.

Since sleep is disabled and there's no accounts or network calls to phone home with a warning, is there a hard cutoff where Capsomnia forces sleep anyway to protect the battery, or does it stay fully committed to keeping the Mac awake even as it runs the battery down to nothing with the lid shut and no visible warning.

The indicator light as a status signal is a clever use of hardware that already exists — way cleaner than a menu bar icon you might miss. Quick workflow question: when keep-awake mode is on and the lid is closed, does the app have any throttle or safety cutoff if the battery drops below a certain percentage, or is it fully manual? Just want to know if I should babysit it or if it handles the I forgot it was running case.

Hey Product Hunt! 👋 I’m Taketo, the maker of Capsomnia.I built Capsomnia around a tiny but frustrating MacBook problem: sometimes you want to close the lid without interrupting a local task, an AI coding agent, SSH session, build, download, or long-running script.Capsomnia turns Caps Lock into a physical keep-awake switch because the key already has a built-in status light. If you already use Caps Lock for something else, you can choose a different shortcut, while the Caps Lock indicator still shows whether keep-awake mode is active.When keep-awake mode is on, Capsomnia disables system sleep so your work can continue with the lid closed. Turn it off to restore normal sleep. The app is free, open source, signed, and notarized for Apple silicon Macs running macOS 14+.There are no accounts, network requests, or telemetry. Since sleep is disabled while the mode is on, please keep airflow, power, and battery use in mind.We’ve already seen strong interest in Japan: 2.3M+ views and 6,000+ downloads.What would you run on your Mac with the lid closed?