Night 1.0

A moon in the menu bar with three things behind it.

• Sleep Display — pmset displaysleepnow, the familiar one.
• Keyboard Backlight Off — keys dark, toggles back to the level it found.
• Display Brightness Zero — panel dark, but the Mac stays awake and unlocked. The framebuffer is live and screencapture still returns real pixels, so an SSH session can drive the screen overnight while the room stays dark.
• Go Dark — both, and it flips to Wake It Up.

Turning the brightness up with F1/F2 hands auto-brightness back on its own; the poll that watches for it is idle-gated down to 0.0005 ms a tick, about 0.75 s of CPU across eight hours.

Night.app.zip is Apple silicon only and ad-hoc signed rather than notarized — first launch needs a right-click → Open, or xattr -dr com.apple.quarantine. Intel Macs and anyone who would rather not run a stranger's binary: ./build.sh takes about four seconds and has no dependencies beyond the command line tools.

The README carries the reverse-engineering notes for DisplayServices and CoreBrightness's KeyboardBrightnessClient, including the dead ends — there is no brightness-change notification on this build, and AppleARMBacklight's IODisplayParameters is a frozen boot-time snapshot that will lie to you.

Finished project, published to share. Not actively maintained.