As of September 2014, Apple has released the GM for Yosemite (OS X 10.10), with expected release "soonish".
ClueTrust is in the process of testing with, and optimizing for 10.10. At this point, we are unaware of any incompatibilities between the current shipping versions of Cartographica and LoadMyTracks and OS X Yosemite. However, since this version of the OS is not officially supported for customer use, we are collecting bug reports through the normal channels, but will not guarantee fix timelines prior to the commercial release of Yosemite.
Please make sure that you are using the most recent versions of Cartographica (1.4.4) or LoadMyTracks before reporting a bug when running Yosemite.
We will update this message once the final 10.10 release is available.