Calender crashes when icloud is activated

Hi Nieken,

Thank you for using Apple Support Communities.

There doesn't appear to be any problem with your English. I understand that when you start Calendar on your MBPro with Yosemite, it crashes if iCloud Calendar is turned on. I would suggest taking a look at the following article, especially the section "Troubleshooting on OS X". The "Troubleshooting at iCloud.com" section could also provide assistance.

iCloud: Troubleshooting iCloud Calendar - Apple Support

Regards,
Jeff D.

Hey Nieken,

Sorry that article didn't work for you, perhaps another one of Apple's support resources will provide a resolution- https://getsupport.apple.com/GetproductgroupList.action.

Cheers,

Jeff D.

Hi Nieken!

Have you tried to complete the action in safe mode with iCloud Calendar turned on? Isolating if the issue occurs during safe mode as well will help you on your search for a solution.

SM

OS X: What is Safe Boot, Safe Mode? - Apple Support

Nieken,

Backup your iCloud Calendars, and disconnect from the internet.

Quit Calendar, then paste this text ~/Library into the Finder Menu>Go>Go to Folder...window and select "Go." This will open the Users Library Folder.

Then open the Calendars Folder which is in that Library Folder, and move any any files with "Cache" listed in the name field to your Desktop.

Next open the Preferences Folder in that same Library Folder and move the com.apple.iCal.plist file to the Desktop.

Log out/in or restart and open Calendar.