Currently Being ModeratedRe: I have lost all my iCal data and do not have Time Machine. Is there anyway to restore my calendars?Oct 26, 2012 8:34 AM (in response to sisterles)
Quit iCal. Go to Macintosh HD > your username > Library > Calenders, and see if you have any folders and files in there. If you have items in there, your data might not be lost.
Go to Macintosh HD > your username > Library > Preferences > and remove the file com.apple.iCal.plist to the desktop. Restart iCal. If your data is restored, you're good to go. If not, quit iCal and return ther file back to it's original place.