Low-Level Keyboard Takeover
Installs an event tap directly at cghidEventTap to intercept keystrokes before macOS window server or running applications consume them.
Fernloop
WhatKey
A focused keyboard takeover and keystroke inspection utility for macOS. Intercept shortcuts, verify modifier chords, inspect HID usage codes, and test input without system interference.
⌘S with HID keycodes, modifier bitmasks, and recent keystrokes.
Full Modifier & Function Matrix
Precise detection for Command (⌘), Option (⌥), Control (⌃), Shift (⇧), Caps Lock, and extended function keys F1 through F24.
Hardware HID & Bitmask Inspector
Shows raw HID usage tables, virtual keycodes, and modifier bitmasks in real time — ideal for diagnosing mechanical switches, firmware macros, and keymaps.
Fading Keystroke History
Recent inputs stream into a clean history strip with decaying visual opacity, backed by a searchable full history modal for audit and review.
- Architecture Universal (Apple Silicon & Intel)
- Minimum OS macOS 12.0 Monterey or later
- App Size 1.9 MB
- Security & Signing Apple Developer ID + Hardened Runtime