@waqast When I follow these instructions, wchusbmodem does not show up as an available port in M5Burner. I checked in /dev and it is not there. The only port that M5Burner offers to me is /dev/tty.Bluetooth-Incoming-Port. My hardware is 2017 iMac5k MacOS Monterey12.3.1, M5Stack Core. Can anyone help?