SUMMARY *** I used Kalendar and KOrganizer etc... and the Problem was the same. I Can create new events that are then shown on my mac, but it doesn't work the other way around *** STEPS TO REPRODUCE 1. Download Kalendar https://apps.kde.org/de/kalendar/ 2. use Dav groupware ressource and basically do what is described for iCloud in the redme https://invent.kde.org/frameworks/kdav 3. start syncing OBSERVED RESULT Doesn't download any events from the iCloud calender. can only create events EXPECTED RESULT Download & Upload (synchronization) SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE neon Plasma Version 5.24.3 KDE Frameworks version 5.91.0 Qt Version 5.15.3 Kernel Version 5.13.0-35-generic (64 bit) X11