Koffee keeps your Mac from going to sleep while an agent, a build, or a download is still running. When you walk away, the screen dims. Touch the mouse and it's back.
Awake · dims in 10:00
Off · your Mac sleeps on its usual schedule
Go ahead, flip it.
Requires macOS 26 or later.
Lives in your menu bar
You hand your coding agent a long task and go to bed. Either the Mac falls asleep and the agent stalls an hour in, or you turn sleep off and the screen glows until morning for nobody.
Koffee keeps the Mac working and dims the screen until you come back.
Turn the switch on. Koffee asks macOS not to sleep, so agents, builds, and downloads keep going.
After 10 minutes with no keyboard or mouse input, the screen dims over a few seconds. You set the delay and how dark it gets.
Move the mouse or press any key. The brightness comes right back.
Mouse, trackpad, keyboard, even the brightness keys. No lock screen unless you've set one up.
If another app is keeping the display on, Koffee doesn't dim. The status line tells you which app.
Turn off "Dim screen when idle" and Koffee only keeps the Mac awake. The screen stays as it is.
Turn on "Only when connected to power" and a switch you forgot about won't drain the laptop in your bag.
After the screen has been dim for a while, Koffee can let macOS put the display to sleep. The Mac keeps running. Off by default.
Click the cup in the menu bar, swipe the switch, or set a global hotkey.
Each connected display gets its own card in the panel and its own dimming method in Settings.
Your display settings are restored when you return, quit, log out, or unplug a monitor. If Koffee crashes, macOS goes back to its normal sleep rules.
Koffee uses the Liquid Glass look and standard system controls, so it fits in with the rest of Tahoe. It runs in the App Sandbox and never connects to the internet.
Koffee dims the picture, not the backlight. On most LCD displays that won't lower power use or make the panel last longer. Only OLED and mini-LED screens get that benefit. What you get is a darker room and a Mac that's still working when you return.
Koffee can't overrule macOS either. Closing the lid with no external display, a critically low battery, Low Power Mode, and update restarts will still put the Mac to sleep.
It keeps your Mac awake while the switch is on. After a few idle minutes it dims the screen, and any input brings the brightness back.
Yes. Dimming only changes the picture. The Mac keeps working.
On most LCD displays, no. Koffee dims the picture, not the backlight, so power use stays about the same. OLED and mini-LED displays do draw less when the picture is dark.
Koffee is built on the macOS 26 interface and frameworks. There's no version for older releases.
Yes. Every connected display dims. If a display doesn't support the default method, Koffee uses an overlay instead and marks that display in the panel.
Another app asked macOS to keep the display on. Koffee waits and picks up again when that app is done.
That's up to macOS. Without an external display and power, a closed lid puts the Mac to sleep whether Koffee is on or not.
No. The app has no network access, no analytics, and no account.
Available on the Mac App Store. Works on Apple silicon and Intel Macs. Requires macOS 26 or later.
