I am using the nRF 52840 development kit to explore Thread. I am using the 'open nRF Connect SDK' command to get the project. I would like to use the 'overlay-usb.conf' option so that I can access the cli via the USB connection using the 'serial' app on the mac.
I am running on mac M1, Big Sur.
Segger 5.50c.
configure is as shown below.

the creation fails with:

I clearly don't understand how to configure the overlay.
Help?
ward harriman
