oXs on RP2040

RPI Telemetry Module, compatible with lots of systems.

https://github.com/mstrens/oXs_on_RP2040

https://www.rcgroups.com/forums/showthread.php?4130529-openXsensor-on-RP2040-board

https://www.rcgroups.com/forums/showpost.php?p=52841555&postcount=11334

ESP32 Serial Driver for MacOS

It is here, under the Drivers tab:

https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers

There is an installer and uninstaller.

When you install, you will probably get a security warning and have to allow it in System Settings.