Dear Geoff and WeatherCat fans,
After 6 months of almost faultless operation my Fine Offset Solar/UV station has suddenly stopped communicating with Weather Cat. USB cable fine, connections fine. I upgraded to Yosemite a week ago. I am still running Weather Cat 1.24.
I don't know if WeatherCat 1.24 does run on Yosemite or not, there is enough wonderful improvements in WeatherCat 2 that you probably should upgrade just to get the extra goodies.
However, your station may have another problem. Check out the troubleshooting tips on the WeatherCat Wiki:
http://wiki.trixology.com/index.php/Fine_OffsetFor your problem it is suggested that you try resetting the station by powering off your console for 10 minutes, then powering it back up, and setting the date/time on the console once more.
Cheers, Edouard