I recently purchased a late-2011 13" MBP and upgraded it to ML. I did not have any prior issues with my iPhone/Mac/iPad/Black MacBook syncing together with iCloud, which is why I'm perplexed after countless Google searches and resets with no answers. My iOS devices are still syncing properly. I can access my updated calendar at iCloud.com. Everything works except for iCal on Mac with iCloud. I now have an exclamation point next to iCloud in the calendar along with a phantom Google calendar that is no longer shared. The error message I get is:
The server responded with an error.
The request (CalDAVAccountRefreshQueueableOperation) for account “iCloud” failed.
Does anyone have a solution for this? I've attempted signing in and out with different accounts to test, allocate and/or delete files from the Library > Calendar folder, Preferences folder and SyncServices, and also verified disk permissions. I'm re-downloading ML now to try re-installing it. I'm out of ideas.
Hey folks I found a workaround. I created another calendar within my iCloud account and migrated everything over to the new account. I guess the old calendar name became corrupted in the midst of the upgrades and device changes. Either way I'm back in business! Hope this helps.