Just FWIW I thought I’d share my experience with Big Sur and my weather setup.
I use the iMac I have as my main computer (I also have a laptop) which means it is also the one the USB dongle from the Davis Vantage Vue Pro 2 console is connected to. I have it on 24/7. Due to that last piece, I thought that Big Sur would give me a chance to test something out.
I bought a Davis WLL (Weather Link Live), which is a Bluetooth adapter that reads directly from the ISS and then reports through Bluetooth to my router and on to Davis Weather Cloud site, and from there the reports can go directly to Weather Underground and CWOP. With that in mind, I updated to Big Sur and indeed WeatherCat crashed and would not report, but I had the Davis Cloud going with the WLL so my WU and CWOP were unaffected.
After reading the thread here, I re-booted my machine and tried to get the new driver, but was unsuccessful, and so thought I was done. I then saw the thread about the Comm check, so I wiped the Comm in WeatherCat and re-booted. I entered the Davis Vantage Pro 2 as the source and viola – WeatherCat again reporting as it’s supposed to.
The upshot – I now use the Davis WLL to feed directly to Davis, WU and CWOP, and have the iMac via Weathercat reporting to PWS and making my website work (see my link to have a look at the website - gauges and all!)
In the end, it’s all good.
Thanks to the WeatherCat community for being so helpful!
Bill