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Calendar on iMac says The server responded with an error and gives three choices: Revert to Server, Try Again, and Ignore. None of these did anything when I clicked on them and I had to Force Quit Calendar in order to continue using my computer.
iMac 27″, macOS 12.7
I have had exactly the same problem and in my case it is associated with my Google Account. If I go to System Preferences/ Internet accounts, select my Google Account and then switch off Calendar the problem goes away. Mind, so do all my events, so it is not a useful solution. At this point I tried to add my Google Account via my Calendar app/ Add Account but after I authenticated with Google it pointed out that I had already got that account so I had to quit that plan. However when I re-enabled Calendar in System Preferences I got my calendar events back but the error had gone! I cannot now say if just switching the Calendar access off and the on did the trick or whether my blundering about trying to add Google again did something but at least, for me now the problem has gone.
I have had exactly the same problem and in my case it is associated with my Google Account. If I go to System Preferences/ Internet accounts, select my Google Account and then switch off Calendar the problem goes away. Mind, so do all my events, so it is not a useful solution. At this point I tried to add my Google Account via my Calendar app/ Add Account but after I authenticated with Google it pointed out that I had already got that account so I had to quit that plan. However when I re-enabled Calendar in System Preferences I got my calendar events back but the error had gone! I cannot now say if just switching the Calendar access off and the on did the trick or whether my blundering about trying to add Google again did something but at least, for me now the problem has gone.
Thanks for that. I thought that turning access off and back on was the key but as I had muddied the water by trying to re-crate the account so I figured it was better to tell the whole story. Presumably there is some stale data cached somewhere that turning on/off flushes out.
I am having the same issue. Did you find a solution?
This worked for me just by turning off calendar and then turning it back on in my google accounts under System Preferences/ Internet accounts - I did not try to re-create the calendar account - thank you so much - this has been such a major toleration!!
2015 MacBook, Monterey 12.7.6
System Preferences
Internet Accounts
Un-tick Google(for me it was Contacts and Calendar)
Power cycle
Calendar works, no server error
Tick Google
Power cycle (just to check)
Calendar still works, no server error
Added a Google calendar event for today
Turned Calendar off and on - Google calendar event appears
SUCCESS
ok this happened to me yesterday (Nov 18) and I am searching for solutions. My Mac is 2015 on Big Sur and does not get any updates anymore.
Same here for a couple of weeks on a 2015 Macbook Air but not (yet) on an ancient iPad Mini 2. None of the suggested fixes have been successful.
Same issue here today
I have been having this same issue too on my MacBook Pro (Retina, 15-inch, Mid 2015) for a couple of months now. I was hoping updating to Monterey 12.7.6 would solve the problem but it has not.
I was able to resolve by removing and then reinstalling the Gmail account from the Mac Internet Accounts.
I can't find an option to force quit Apple calendar, but have the exact same problem
No but it just somehow corrected itself. It may have corrected with a software update.
Same issue suddenly on all my macs. Solutions anyone?
Hey everyone - this worked for me....easy peasy. Thanks NickDMWest.
Life goes on after Apple.
Calendar message Server error
Calendar server responded with an error
