I have just upgraded to Mountain Lion and lost all my iCal data. When I open it, it starts an upgrade process then an error message appears saying 'cannot be upgraded, account already exists'. Ruining my week... would be so grateful for any advice.
I have just upgraded to Mountain Lion and lost all my iCal data. When I open it, it starts an upgrade process then an error message appears saying 'cannot be upgraded, account already exists'. Ruining my week... would be so grateful for any advice.
