I am using iMac and MacBook Pro. When I edit Calendar, note and reminder in MBP, an error message with "igor, try again, revert to server" shows up. And editing that I made on MBP does not appear on the same apps on iMAC. Could you please give me some advice on what is wrong with this?
iMac (27-inch, Late 2012), OS X Mountain Lion (10.8.4)
I would recommend this article to help troubleshoot what is going on with the iCloud calendar in the Calendars application. Named iCloud: Advanced Calendar and iCal troubleshooting it can be found here http://support.apple.com/kb/TS4337.