iCal freezes up after upgrade to El Capitan
I recently upgraded to El Capitan on my iMac and am now having issues with my iCal. Whenever I launch it, iCal will freeze up with a message "Retrieving data from Server" and then will say it cannot ('make sure you are connected to the Internet") and asks if I want to try again or try later. Most times it just freezes at Retrieving Data point and I have to Force Quit to get out of iCal.
Any suggestions?
Thanks!
Jon