Calendar crashing on iMac after Mavericks install

Question

I installed Mavericks yesterday, all was fine. Tonight, when I open Calendar on my iMac, it opens but displays no calendars, just the blank grid, then it crashes. Any ideas?
Dale

Answer 1

Well this is definitely caused by iCloud sync. It seems that there is some corrupted calendar which makes the app crash. If you delete iCloud account from mac, delete all data in ~/Library/Calendars/  and reboot, Calendar should works fine. When I add my account again calendar start crashing again. But I think i fixed this.
1) Export your calendars from your icloud.com (push button to share your calendar and copy adress to clipboard. Then paste it to new browser window and put http:// instead webcal://). Your calendar will download.
2) Remove all your calendars from iCloud. You can even try to make new blank calendar and set it do default so you can delete all your old calendars.
3) Remove your icloud account from computer. Delete everything ~/Library/Calendars/ then reboot your computer. This is necessary step because you need to remove Calendar Cache from your system
4) Empty your bin.
5) Add your iCloud account again and reboot
6) If your Calendar app works fine you can add your calendars again. If not, try do these steps again but when you add account it asks you what you want to sync. Try to add your account without cal and turn on sync later...
Hope if it helps...