Ajar: Mac Utility That Maps Lid Angle to Brightness, Volume, and Keyboard Backlight
By
Lauren
Good intentions, undercooked execution. The bake is missing.
Summary
Ajar is a Mac utility that turns the MacBook's lid angle into a functional input. It offers two main features: Lid Angle Sync, which adjusts screen brightness, keyboard backlight, and system volume based on the lid's position (configurable via a visual curve), and Keep Awake, which intelligently prevents sleep during active work sessions (including built-in support for Claude Code, Codex, and Gemini CLI). The tool supports multiple displays with per-display offsets and custom wake rules for apps, Wi-Fi, disks, and power.
Key quotes
· 3 pulledI built Ajar because the lid angle on a MacBook is the most overlooked input.
You already change it dozens of times a day, opening it, half-closing it for a quick break, propping it up to read in bed. macOS does nothing with that signal. So I wired it up.
Ajar makes your Mac respond to what you're doing, not what you remember to press.
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