Thank you for the help.
I tried your proposal. Unfortunately, the situation is the same: No planets and Sun, only the Moon is present. If you ask to go to the Sun, Kstars says that the object is currently under the horizon. I checked the configured location and it is set to my location here in Andorra.
I start to believe that this build of Kstars for the Mac is not complete. Later today I'll try to look for a previous version or will try to copy the files from my Raspberry Pi (if these are compatible).