Hi Steve, Blick, Felix and WeatherCat fans,
Felix, I believe the data logger that required a driver update for Yosemite compatibility was the USB logger.
Actually, Stu discovered that the problem with the Silicon Labs driver was an Apple bug in OS 10.10, not in the driver. It was fixed before Yosemite was released. See this posting:
http://athena.trixology.com/index.php?topic=1386.msg11926#msg11926Cheers, Edouard