I can connect to my MacAir just fine via the Chrome Browser in Terminal mode as suggested in the msg you forwarded.
I¡¯ve got a screen that says ¡°CONNECTED¡± to the QDX via USB.
I¡¯ve downloaded the most recent firmware for QDX and have it on a flash drive but now what do I do? I¡¯m really way over my head at this point. Don¡¯t know the syntax for entering that file in the QDX with Terminal and over riding the earlier one.
For a PC it's easy I guess with simply dragging the firmware file into some directory in File Manager but this is a MacAir.