Upgrading Calendars
Every time I open Calendar, I get the "upgrading calendars" taskbar, and it hangs. I've done the "remove cache" from Library, I've forece quit the app, I've quit and restarted the app, and I've switched Calendar & Reminder off in iCloud Settings. In some of those cases, the problem goes away, but returns the next time the computer is switched on. Also - after a few days of it, my iPhone & iPad stop getting updates from events created in Calendar on the Mac.
Any ideas?
Hopefully something that will change with the next update.