Mac Calendar "Server responded with an error" message

Same here. Shows up on my desktop but not on any other device. I'm running 11.2.1. I'm getting 2 messages: "The server responded with an error" and "Your calendar couldn't be refreshed. Access to account "(my email which goes through google)" is not permitted. The server responded: "403" to operation CalDAVAccountRefreshQueuableOperation." It's been happening for 2-3 days. Called Apple, they can't help and don't even seem to know what to do. I told them about this discussion and others and they say it's Google's problem.

Same issue here. I already tried deleting the account and restarting my mac. It helped for a few days and then the issue just reappeared. I have this both on my Catalina and my Big Sur, so it isn't related to Big Sur

I think it has something to do with way apple communicates with google on more than just the mac. I'm now having the problem where my ipad calendar is not syncing with google calendar. I'm not getting an error message like on the mac, but it isn't syncing.

I switched to fantastical on the mac because I need a calendar that works and right now that is working perfectly and instantly, but the ipad hasn't been able to sync for a while.

I think this started without any updates from apple, so google probably changed the way their server works in some way.

Maybe google is trying to get back at apple for all the privacy fights they have been having.

Same problem as everyone else. Strange that the error message is always accompanied by a calendar icon showing "July 17". I really don't care who's responsible for this - Apple or Google - I just urgently need a working calendar app. Can someone please post a method for backing up my Google calendars and transferring them to Yahoo calendars (which is working) or Apple's own, whatever that is.

Sorry if this inquiry strikes this community as primitive but I'm just a non-tech user trying to get work done on my Mac. What I really don't understand is why both Apple and Google aren't upfront about software glitches; we all know they're going to happen occasionally - just be honest and keep us updated!

I think the user who posted about the times is right - mine seems to work from 9pm NZT to 9am ... then breaks again. Maybe a google server is being taken down for maintenance or something completely random!

pundit761, This happened to me (blank calendar when rebuilding) when I deleted the 3 cache files but not the plist file in Preferences. But it didn't matter, a few hours later after deleting all 4 files and rebuilding the problem re-emerged so pointless exercise to rebuild the calendar...

Certainly in Japan it seems to start working at 5pm local time. Not sure what time it breaks but in the morning it is broken again.

done delete and rebuild but it just goes bad again - IT IS TIME BOUND FOR SURE.....

SUCCESS. Had to tell Google access was okay. Deleted Google Calendar (and library calendar caches for old time sake). Reinstalled Google Calendar acct. Then went to email from Google saying account access granted. On that email is a button to verify it was me what did ir; and a button that said it wasn't me. . Click Yes it was ma access being granted.e and GoogleCalendar showed on macbook pro.

Google needed an affirmative response to emai about calendar.

Points to security change on Google's side. Apple may not be at fault here.

Not sure how this would work if it syncs during the day and loses sync at night as many of us have noticed. Did you verify yours still syncs after calendar refreshes? Make sure you check day and night time sync doesn't change. Let us know. Thanks.

Just an update for all. After testing on my MBP (x2), iPhone, and iPad...it was evening EST timezone. I left it "as is". I did not remove/add calendars or clear caches, etc. I was back on my Macs this morning and no server error messages. Everything was working normally.

I will see how it behaves tonight to see if it is a time of day thing.

I tried the David Drahos method ... no dice yet. My Notes and Contacts repopulated nicely, but nothing from GCal is appearing on my iCal. Does it take a very long time? My account is set to refresh every minute and I've tried a manual refresh several times. Nothing.

This is driving me crazy. I am having the problem for about a week. Have tried everything, adding accounts, deleting accounts, etc. it looks like the problem is not happening with the iPhone. I am using Big Sur, have done all updates and still the problem persists.

I think it now replicable - Starts working at around 5pm JST and stops working around 11am JST. Cant be sure that there wasn't a period of non operation during the night - but at least it doesn't seem to work at all 11am to 5pm here.

When this started, it wasn't so clear cut as this in terms of timing but seems consistent now. Will need to check again today.

Maybe this was due top propagation of some kind of update

This has been an ongoing problem with Apple's calendar app. If you do enough searching, you'll find several "solutions", like:

Clearing the calendar cache.

Removing and re-installing the calendar account

Revoking and re-granting Google permissions

etc.....

In my experience, none of these is a particularly reliable solution. Bear in mind that this is an Apple problem, and not a Google problem. How do I know? I downloaded One Calendar from the app store (free download), and haven't had a problem since. It's been rock-solid, unlike Apple's turd-of-an-app.

Has anyone gotten through to Apple on this? I had a similar issue in August of 2019 where GCal events wouldn't load at all in the native Mac calendar app (see this thread for a description). At the time, I submitted service requests to Apple *and* Google, and I want to say the issue was resolved in a matter of a couple of days. Here, it's been two+ weeks and I'm losing my mind. Issue is unique to my Mac -- I've had zero problems on my iPhone. I've cleared cached, disabled and enabled Gmail account, updated Mac OS, restarted my computer, etc. all to no avail. Like other people have noted, the sync issues seem to be running on some kind of cycle. I'm in the central time zone of the US, and by late evening each day, the Calendar app starts having issues connecting to the server. However, when I use the app the next morning, the issue goes away -- very weird. I like the native calendar app for Macs, but I can't hold out much longer on a fix to this -- how are you supposed to use the app if it can't reliably sync with Google's server?!