Trackpad apps

Magic Knob

Magic Knob turns two-finger trackpad rotation into a dial for volume and brightness. It is a native macOS menu bar utility for trackpad users, with customizable three-finger click actions, adjustable sensitivity, and an on-screen overlay. Works with MacBook trackpads and external Magic Trackpads on Apple silicon Macs running macOS 14 or later. Free trial, then a $9 early-bird one-time license for one Mac.