A problem for a long time, usually do not use this synchronization of the calendar. Take some time tonight to settle down.
Refer to the Apple website calendar for questions and answers.
When the following conditions occur:
-
- Exit calendars and reminders.
- Choose System Preferences from the Apple (?) menu, then click ICloud.
- Click the checkbox to uncheck Calendar and reminders. In OS X Mountain Lion, uncheck the single checkbox for calendars and reminders.
- Turn off system Preferences, and wait a few moments.
- Open System Preferences, and click ICloud.
- Click the checkbox to select Calendars and reminders. Select a single checkbox for calendar and reminders in OS X Mountain Lion.
- Turn off system Preferences.
- Open reminders and test to see if the issue is resolved.
- After the above operation can be restarted.
Troubleshoot calendar problems with your Mac: Server responds with an error