USB Hotplug Detection in Rust on macOS — Reacting to Device Connect/Disconnect (opens in new tab)

All tests run on an 8-year-old MacBook Air. All results from shipping 7 Mac apps as a solo developer. No sponsored opinion. HiyokoAutoSync and HiyokoMTP both react instantly when an Android device is connected. No polling. No "refresh" button. Just plug in and it works. Here's how USB hotplug detection works in Rust on macOS. The approach: nusb hotplug API nusb provides a hotplug watch API that wraps macOS's IOKit USB notifications: use nusb::hotplug::{HotplugEvent, HotplugWatch}; fn watch_us...