USB Keyboard Modifier Remap

Features

USB Keyboard Modifier Remap lets you fix a misbehaving USB keyboard in seconds. Got a board where the middle key acts as Command, or Alt and Command are swapped from what's printed? Remap them — for that keyboard only, leaving your Mac's built-in keyboard exactly as it is.

Per-Device Remapping

• Targets one keyboard — Matched by USB Vendor/Product ID, so the remap applies only to the keyboard you choose.
• Built-in keyboard is safe — Your Mac's laptop keyboard is never affected.
• Any modifier — Remap Control, Option (Alt), Command, Shift, and Caps Lock, with independent left and right keys.

Live Key Preview

• See it light up — Press a modifier and watch it glow on screen.
• Original vs. output — A cyan row shows the original physical key you pressed; a yellow row shows what macOS actually receives after remapping.
• Instant confirmation — Verify your remap is working without opening another app.

Notes & Persistence

• Per-mapping notes — Jot down why you made each change; notes are remembered per keyboard.
• Apply temporarily — Test a mapping that resets on unplug or reboot.
• Save as a login item — Make your remaps stick automatically at every login.

Clean & Native

• No kernel extension and no sudo — Built on Apple's hidutil.
• No Input Monitoring permission needed to apply remaps.
• Tiny & fast — A focused single-window utility.

System Requirements

• macOS 13 (Ventura) or later
• Apple Silicon or Intel Mac
• A USB keyboard