Hello... my MacBook Pro running os27 calendar app (ical) is not syncing with iCloud. On all of my devices, the calendar syncs fine and on the iCloud website the calendar syncs fine. It's just on my MacBook.
I've tried turning off calendars and reminders in settings on my MacBook and restarting. When I first open and refresh the calendar it works great, all events are synched. Then around 10 minutes later, it stops syncing and I get the error message "unable to connect to the internet".
Please help!