iCal calendars changing to read-only

Some users have had problems with iCal changing calendars to read-only, which results in an error when users attempt to edit events or add new ones.

Apple Discussions poster TTemp writes:

"My iCal changed to 'Read-only' calendar a couple of days ago for some strange reason. When trying to write in my calendar I get 'Read-only Calendar' 'You cannot change events or To Do in a read-only calendar.'"

For some users, this problem has self-corrected, with the calendar reverting back after a week or so of being "read-only". This is puzzling behavior, but indicates there could be something wrong with either iCal or perhaps some synchronizing functions such as iSync or MobileMe. This is not a new problem, as users running OS X 10.4 have had this issue as well as those running 10.5. Still, while the specific cause of the problem is not known, users can force calendars back to being editable by exporting them and reimporting them.

Fix: Reimport affected calendars In iCal, select the problematic calendar and choose "Export" from the "File" menu. This will allow the calendar to be saved to a temporary location such as the Desktop. When the calendar has been saved, delete it from iCal and then from the "File" menu, select "import" and import the previously saved calendar. This should allow the calendar to be readable again.

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