Thanks for the reply. I really don't understand the issue. Never a problem until I had to get a new computer (iMac, running Big Sur). As mentioned, a clean install of all software and drivers. Davis station is on AC and has battery for backup installed in unit. I have tried everything I can think of, and steps recommended on this forum. I did email issue to tech support, but no response so far.
I hope WeatherCat v3.2, mentioned under the development forum will allow connecting to the Davis WeatherLink device, which I have. It's a round-about way to get it to work, but what the heck, if it works, I would be happy.
If you learn anything, I would appreciate the update.
Sid