Capsomnia
Caps Lock keeps your Mac awake, even with the lid closed
Details
- External ID
- 1200286
- Source
- PH
- Company
- —
- Product
- Capsomnia
- Website domain
- producthunt.com
- Launched
- July 25, 2026
- Cohort
- —
- Upvotes
- 158
- Upvotes percentile
- 0.05963302752293578
- Tags
- Mac, Open Source, Developer Tools, GitHub
- Fetched at
- Sept. 7, 2026, 1:23 a.m.
- Updated at
- Sept. 7, 2026, 1:23 a.m.
Description
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.
Enrichment
- Theme
- sleep, wake, and clock utilities
- Vertical
- Horizontal
- Function
- Hardware & robotics
- Audience
- B2C
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- caps lock key keeps mac awake
- Manually corrected
- False
Could you build this?
No Keeping a MacBook running with the lid closed requires deep macOS IOKit power management, IOPMrootDomain kernel assertion tampering, and low-level HID keyboard event hooks that bypass Apple's strict clamshell sleep hardware constraints.
What it would actually take: Developing this requires deep low-level Objective-C/C++ knowledge of macOS private IOKit frameworks (`IOPMLib.h`, `IOPMAssertionCreateWithName`) and HID manager APIs to monitor Caps Lock state. Preventing clamshell sleep specifically without an external display connected typically requires private Apple system APIs or kernel-level workarounds (similar to Amphetamine's closed-display mode or sleepless kernel extensions) that fight macOS power management security restrictions.
Competitors
Other products that read as similar to this one — 213 launches clear the similarity bar, closest 8 shown.
Attention rank: #213 of 214 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 253 days after the earliest competitor.
- Adrafinil · hn · 2026-06-27 · 124 upvotes · similarity 0.66
- Open Caffeine · ph · 2026-06-01 · 162 upvotes · similarity 0.55
- agents-dont-sleep · github · 2026-09-23 · 8 upvotes · similarity 0.53
- BlurShield · ph · 2026-09-16 · 3 upvotes · similarity 0.51
- Lockpaw One hotkey to cover your Mac screen without putting it to sleep · hn · 2026-03-23 · 7 upvotes · similarity 0.51
- SoloDisplay · ph · 2026-09-26 · 1 upvotes · similarity 0.50
- Don't Lock My PC · ph · 2026-09-10 · 2 upvotes · similarity 0.50
- My Mac slept through its cron jobs, so I made goguma, a menu bar app · hn · 2026-08-19 · 8 upvotes · similarity 0.50
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a hardware & robotics tool for Fintech yet.