Basecamp on Mac connection to Edge 540 very slow!

I am trying to use Basecamp on Mac.  Connecting to a new Edge 540.  It is extremely slow to download the maps on my device and in fact it is so slow that it is unusable.  I have tried everything that is recommended and available as solutions oBasecamp n the net even tried ChatGPT!  I have Sonoma 14.5 as software.  I am connecting with the cable provided by Garmin USB C to my Mac, Have already tried different ports.  Reloaded Express, Basecamp a few times, reset my Edge 540 to factory settings.  I am about to give up!  Any ideas?