Open-source Swift driver resurrects the Griffin PowerMate USB knob (VID 0x077d, PID 0x0410) on macOS 13+ with scroll, click, and LED control.
Key Takeaways
Uses kIOHIDOptionsTypeSeizeDevice for exclusive HID access; only one process can hold the device at a time.
Exposes onRotate(delta:rate:), onButtonDown, onButtonClick, and onButtonLongPress closures; long-press threshold defaults to 0.4s and is tunable.
Menu-aware: when Accessibility API detects a focused menu, rotation sends arrow keys and short press sends Return instead of scroll/click.
LED supports static brightness (0-255), built-in pulse modes, and custom pulse tables via USB vendor control requests matching the Linux driver protocol.
Requires Input Monitoring permission on first run; Accessibility permission needed for submenu navigation without fallback 5-second menu mode.
Hacker News Comment Review
No substantive HN discussion yet; the single comment reflects the likely common situation: hardware is owned but physically misplaced in a USB junk drawer.
