As of October 2015, Apple has released the OS X El Capitan (version 10.11).
ClueTrust is in the process of optimizing for 10.11. We are aware of one visual side-effect in the Map Layout windows where the "handles" on the individual elements are not visible. We are working to correct this in a future update. At this point, we are unaware of any other functional incompatibilities between the current shipping versions of Cartographica and LoadMyTracks and OS X El Capitan.
Please make sure that you are using the most recent versions of Cartographica (1.4.4) or LoadMyTracks before reporting a bug when running El Capitan.