WeatherCat Version 4.0.0 dev release #9 is now available for testing. See https://athena.trixology.com/index.php?topic=3696.0 for more details and download.
So I just found this forum! I have also already made the plunge to El Capitan (ver 10.11.5) on a Mac mini and cant manage to get the USB driver to see my Davis Vantage Pro2 interface. So any assistance would be great. I did try the USB hub trick with no luck. Thanks!