Bruce,

It's a hodge-podge:

Intel based macBook Pro (i7) running parallels 16 running Win10
Cable = USB-c to USB-a adaptor > keyspan (USB to serial adaptor) > serial to ethernet adaptor > ethernet cable to speaker

fupload appears to see the speaker. That said, hitting the "Identify" button results in a failure to identify

I'd be grateful for any guidance

Thanks

Living room: 818v3, Audio Research D150, Maggie 1.6
A/V room: 861v8, DSP7200SE L/R/C, 4x DSP320 surrounds, ID41 + Roon, UHD722, Prime+PS