One slider per screen — even the monitor your keyboard can't touch.
Lights out.Agents on.
Keeps your Mac awake for your agents. Dims every screen — even the external monitor. You sleep. Dimmer stays up.
macOS 13+ · Apple Silicon & Intel · Notarized by Apple
Hi! I'm Dimmer —
an owl named Dimmer.
100%Free!
Why Dimmer exists
The midnight problem
11:58 P.M.Gasp!
Bedtime. But the agent has 4 more hours to go!
Rule #1
If the Mac sleeps, the agent stops. Lid stays open.
But then…Glare!
The MacBook dims with a key. The monitor? No key. It blazes all night.
Enter: Dimmer!Pow!
Mac awake. Every screen dark. One owl, one click.
For anyone who leaves AI agents running overnight — and can't close the lid.
“My monitor glowed all night and no key could dim it. So I built Dimmer.” — Bejinji
Interactive demo
Try it right here!
Watch the tour — then it's your turn.
Click me!
~/my-startup — claude
agent ▸ reading 214 files…agent ▸ refactoring auth/session.tsagent ▸ running test suite (412 tests)▍
Small owl. Big night.
30 minutes to forever. When time's up, your Mac sleeps as usual.
Awake for 5 hours, every screen black. Press again for Good Morning.
No lock screen at 3 a.m. Your Mac never looks asleep when it isn't.
Also:Custom hotkeysExtra-dark modeRemembers levelsClick the owl to wake8 languagesAuto-updatesCollects nothing
One owl, four moods
His face in the menu bar = your Mac's status.
Snooze
Nobody is keeping your Mac awake.
The Wink
Another app is already on duty.
Night Shift
Mac awake. Orange eyes = display kept on, too.
Moonlighter
Awake, and the screens are dimmed.
Hoo's asking?
Will my AI agents keep running with the screens off?
Yes. Dimmer only darkens the screens — the Mac stays awake, so Claude Code, Codex, builds and downloads keep going.
Does it change my external monitor's real brightness?
With DDC/CI over a direct connection, yes. Through most docks and hubs it uses a perfect black overlay instead.
My Mac looked asleep with other keep-awake apps. Why?
macOS turns the display off and shows the lock screen, even though the Mac is awake. “Keep Display On” stops that.
Is it really free?
Yes — no trial, no account, no ads. If Dimmer saves your nights, you can buy him a coffee.
Get Dimmer tonight!
Drag to Applications. Click the owl. Go to bed.
⬇ Download for Mac — Freev1.1.3 · .dmg · 5.4 MB · macOS 13+ · Apple Silicon & Intel · Notarized
Saved your night?
Buy Dimmer a coffee
Buy Dimmer a coffee