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.
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?
Congrats on shipping this! Using Caps Lock as the switch is such a nice call, no menu bar clutter and nothing new to remember. Did you land on Caps Lock straight away, or try a few other keys first?
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
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?
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.
About Capsomnia on Product Hunt
“Caps Lock keeps your Mac awake, even with the lid closed”
Capsomnia launched on Product Hunt on July 25th, 2026 and earned 178 upvotes and 23 comments, placing #5 on the daily leaderboard. 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 was featured in Mac (103.6k followers), Open Source (68.6k followers), Developer Tools (516.4k followers) and GitHub (41.3k followers) on Product Hunt. Together, these topics include over 125.8k products, making this a competitive space to launch in.
Who hunted Capsomnia?
Capsomnia was hunted by Taketo Fujimaki（藤巻雄飛）. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Capsomnia stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Taketo Fujimaki（藤巻雄飛）
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?