SiteList review score
Delivers fast, server-rendered guides and precise positioning for Apple Silicon Mac developers. Missing analytics tracking and minor template defects require prompt repair.
Reviewed on Aug 26, 2026
Clamshell — Close your MacBook. Keep the work running.
clamshell.dev
Owner-verifiedWhat it does
Keep your Mac awake with the lid closed so your agents keep running. The internal display sleeps and wakes instantly on lid open.
Two ratings
Verified user rating
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Screenshots
Captured during our latest review on Aug 26, 2026
Pricing details
One-time purchase / lifetime license Billed one time.
| Plan | Price | Details |
|---|---|---|
| Lifetime | $9.99 one time per license | Lifetime license for Clamshell One Mac per license View source |
Key features
Lid-close wake lock
Power management
Keeps a Mac awake with the lid closed, no external display required
Display sleep isolation
Power management
Internal display sleeps while agents, builds, and downloads keep running
Battery & power transition handling
Power management
Works on AC or battery, with an optional low-battery safety switch
Unprivileged execution
Security
No admin rights: no kernel extension, no privileged helper, no sudo
Instant lid wake
Power management
Wakes instantly on lid open
Who it’s for
Coding agent sessions
Keep agents like Claude Code running overnight with the lid closed
Terminal & build workflows
Maintain terminal sessions, builds, and downloads while the screen goes dark
Buyer questions
Questions buyers actually ask
Which Macs and macOS versions?
Apple Silicon Mac laptops on macOS 14 or later. The Option-close gesture needs a lid angle sensor: MacBook Air M2 (2022) or later, or 14-inch / 16-inch MacBook Pro (2021) or later.
Will my agents and terminal sessions keep running?
Yes. Closing the lid only turns the screen off: agents, terminal sessions, builds, and downloads keep running, and the Mac stays on the network for SSH and screen sharing.
Do I need an external display?
No. macOS normally needs an external display attached before the lid can close; Clamshell removes that. No monitor, no dock, no HDMI dummy plug.
Is this the same as clamshell mode?
Same idea, without the monitor. Clamshell mode is what macOS calls working with the lid closed, and macOS only allows it when an external display is attached. Clamshell removes that requirement: close the lid and the Mac keeps running on its own.
Why doesn't caffeinate or my keep-awake app work with the lid closed?
Most keep-awake tools only prevent idle sleep. Closing the lid forces a different kind of sleep they don't block. Clamshell switches exactly that lid behavior, needs no admin rights, and restores it the moment you disarm.
Will it drain the battery or overheat?
Your Mac runs as it would with the lid open: idle work sips power, heavy work draws what it always draws. It works the same on battery, and Clamshell re-applies itself on every plug or unplug.
Does it need admin access?
No. Clamshell is a normal menu bar app: no kernel extension, no driver, no privileged helper, no sudo.
What if I quit Clamshell or it crashes?
Disarming or quitting retries restoration and warns you if macOS refuses it. The direct edition can also relaunch after an unexpected exit when its crash-recovery agent is permitted.
Can I get a refund?
Yes. Every purchase has a 14-day money-back guarantee, for any reason.
Product FAQ information · View source
The expert review
Clamshell earns an 89/100 review score for its laser-focused utility positioning and clean technical performance on Apple Silicon Macs. Its primary weakness is a complete lack of measurement analytics paired with minor template alt-text defects.
89/100: strong technical foundation, zero analytics tracking
Verified user reviews
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- Domain
- clamshell.dev
- Category
- Desktop & OS utilities
- Pricing
- Paid · $9.99/mo
- Platforms
- desktop
- HQ
- Hungary
- Last checked
- Aug 26, 2026
- Public dimensions
- 13
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