Hello, I was wondering if anybody know about the 'Window' functionality in the Calendar application of OSX. Here I can choose between 'Calendar' and my username 'ros'. Until now I never used/clicked on 'ros' but yesterday I did and Calendar switched to a new view called 'ros'. This calendar was plain empty but immediately started to sync all of my CALdav events in the same way it did originally with 'Calendar' after the initial setup. I can confirm that all events also synced a second time locally as I have two .caldav folders now in ~ros/Library/Calendars/ filled with .ics files. Checking my OSX backup I see only one .caldav folder with hundreds of .ics files before. I also can switch (or cycle) through both windows via the menu: Does anybody know what functionality this bears? I only have a single CALdav account setup, with only a single user account on my system, there should be no need for duplication as in two syncs, two folders. Also, whenever I start the Calendar now, per default it starts up with window 'ros' (last picture) no matter what was selected before. Bug? Feature? Undiscovered land? Thanks a lot for any input!