Closing my MacBook used to kill whatever I had left running: a build, a download, sometimes an agent halfway through a task. I made Clamshell to fix that. The lid shuts, the screen goes dark, and the work carries on. No monitor, sudo, or admin setup.
Clamshell started with a very ordinary annoyance. I would close my MacBook, leave a build, download, or coding agent running, and come back later to find that the whole thing had stopped.
I tried the usual workarounds. Some only prevent idle sleep. Others change a system-wide setting that is easy to forget. I wanted one small switch I could turn on only when I needed it.
So I built Clamshell. Arm it, close the lid, and your Mac keeps working while the internal display goes dark. Open it again and normal lid behavior comes back. You can arm it from the menu bar, with a shortcut, or by holding Option while closing the lid.
It checks itself again when power changes. I also added a low-battery cutoff because keeping a Mac awake is not very useful if it runs the battery flat.
Setapp gave me a reality check before this launch: more than 500 people are already using Clamshell, and so far I have had one bug report. That bug is fixed.
If you prefer the direct version, the trial lasts seven days and does not ask for a card. After that, it is $9.99 once.
If you run long builds, downloads, local servers, or coding agents, I would genuinely love to hear how it works on your MacBook.
To answer your forum question: lid cracked open like an animal, which is exactly the problem. What I'd want next is the reverse trigger -arm it until a given process exits, so the Mac finishes the build and then actually sleeps, instead of staying awake in my bag/bed/ table until the battery cutoff catches it. Is there anything like that on the roadmap?
About Clamshell on Product Hunt
“Close your MacBook. Keep the work running.”
Clamshell launched on Product Hunt on August 15th, 2026 and earned 91 upvotes and 6 comments, placing #11 on the daily leaderboard. Closing my MacBook used to kill whatever I had left running: a build, a download, sometimes an agent halfway through a task. I made Clamshell to fix that. The lid shuts, the screen goes dark, and the work carries on. No monitor, sudo, or admin setup.
Clamshell was featured in Mac (103.7k followers), Productivity (659.9k followers) and Developer Tools (518.8k followers) on Product Hunt. Together, these topics include over 249.7k products, making this a competitive space to launch in.
Who hunted Clamshell?
Clamshell was hunted by Matyas. 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 Clamshell stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Matyas
Hey Product Hunt,
Clamshell started with a very ordinary annoyance. I would close my MacBook, leave a build, download, or coding agent running, and come back later to find that the whole thing had stopped.
I tried the usual workarounds. Some only prevent idle sleep. Others change a system-wide setting that is easy to forget. I wanted one small switch I could turn on only when I needed it.
So I built Clamshell. Arm it, close the lid, and your Mac keeps working while the internal display goes dark. Open it again and normal lid behavior comes back. You can arm it from the menu bar, with a shortcut, or by holding Option while closing the lid.
It checks itself again when power changes. I also added a low-battery cutoff because keeping a Mac awake is not very useful if it runs the battery flat.
Setapp gave me a reality check before this launch: more than 500 people are already using Clamshell, and so far I have had one bug report. That bug is fixed.
If you prefer the direct version, the trial lasts seven days and does not ask for a card. After that, it is $9.99 once.
If you run long builds, downloads, local servers, or coding agents, I would genuinely love to hear how it works on your MacBook.