Mac Calendar "Server responded with an error" message

It's just my MacBook Air (M1, 2020) macOS 11.2.1 (20D74). The iPhone X and iPad are fine. I'm using GMAIL (4 accounts) and they're all dead as far as iCal is concerned. I deleted them all, shutdown and restarted, re-installed etc etc - still nothing.

UPDATE 2

Eliminating accounts Google accounts, flushing caches, force quitting, and restarting did nothing.

After a few minutes of having a blank list, back to the Error notification.

Using Calendar for the Mac

MacBook Pro (16-inch, 2019)

MacOS Big Sur 11.2.1 (20D74)

Hi David Drahos,

thanks for posting what worked for you.

I followed this method exactly but unfortunately, it didn't work for me. I am on Catalina 10.15.7 and it was occurring on high Sierra & Mojave ( I have been updating, hoping that would fix it)

I am having this issue on multiple computers & on different OS and is happening with more than one google account.

The majority of my calendars are in iCloud but I have some which have to be Google.

I really hope Apple fixes this quick as it is bad news for me and I am sure many, many others.

Really really strange but the issue is resolved and it's now working OK.

But I remember it was working OK yesterday and I'm afraid the issue is resumed when I wake up tomorrow...

macOS 11.2.1

MacBookPro13,2

FYI, it's now 2100 on February 24 in Japan, which is 0400 in Cupertino.

At the moment, the triangle in the upper left corner of Calendar is gone. It is currently 12:40PM [EST].

The same thing happened yesterday, and once nighttime comes around, the error reappears.

It doesn't seem to be an issue because of the macOS version since many of us are having the same issue with a different macOS.

Also, as stated before, peculiar how for some of us the error is gone in the morning to afternoon hours, yet reappears in the evening to nighttime hours. Apple and/or Google must have changed something on their end that has broken the sync.

Writing here won't really resolve our issue. We all must call Apple Support so there is an official bug report. Once they are informed by hundreds/thousands of us, they will probably take action. Posting and venting here will not resolve it.

And, as to contacting Google (only within a forum and probably a generic troubleshooting reply), I'm sure the reply will be that they aren't responsible for Apple software being incompatible with their services. Of course, it could be Apple's response as well. Hopefully not.

rawsaxy, as I posted earlier, some of us have talked to humans at Google... even tier-2 and tier-3 people. So far they said they're aware of this user issue, but they looked at it on their end and everything looks normal as far as their servers` configuration and performance.

I slightly lean in that direction too (placing the responsibility with Apple), because other calendar apps like BusyCal and Fantastical work perfectly.

Indeed, I urge everybody to contact Apple support - especially if you have an enterprise account - as well as media outlets like Engadget and ArsTechnica. Or drop $10K on a WSJ ad. ;-)

lol the definition of someone who shouldn't have a job in today's economy. Horrible response and horrible customer service. We can only hope no one employs this person for anything important out there.

This must be a recent issue as I have not experienced it before on all my Google accounts (at once). I believe it is isolated with Google Calendars <-> Apple Calendar app. My iCloud calendars sync just fine (which is what I expect being in the Apple eco-system). I have three Google accounts (personal, family, and work) that are all experiencing this "The server responded with an error." message.

I can report it is happening on macOS 10.13.6 (High Sierra) and on macOS 10.15.7 (Catalina)--my two different work MacBook Pros. Every so often the triangle with "!" would disappear only to come back random at random times. My iPhone XR (on iOS 14.4) is set to sync to the same calendars and appears to be behaving as well as my iPad Air 2 (on iOS 14.4) when tested with the Google calendar displayed in a web browser.

This is highly irritating as our family planning calendar is sitting on our Google account and has worked well until recently.

Based on some of you who contributed to this thread, I looked at FantasiCAL and would not mind paying a one time price for the software, but it looks like it has gone the way of monthly subscription. I tried setting up the FREE version only to discover that any view (daily, weekly, monthly, yearly) indicated PREMIUM was required. I found this odd as I just want a basic calendar that syncs.

Once again it worked for 12 hours or so when I deleted my caches and reloaded calendar (losing all my time zone information again, arg). Then around Feb 24 5pm California time, it stopped working again. Big Sur 11.2.1. MacBook Pro

This is interesting I have the same issue.... just noticed yesterday that at 5pm (JST) UTC + 9 - it started working correctly - bit by next days broken again.

I have followed all the cache removal/plist trashing steps and still have the issue which seems to be time bound

I'm in Japan too and I use the multi time zone feature on appointments. Turning that feature off doesn't fix it tho, but the feature is removed when I rebuild the calendar. I haven't tried rebuilding the calendar and leaving that feature off. Has anyone tried that?

Same problem. Started last weekend. 2-22 or so. Imac with Big Sur and MacBook Pro with High Sierra. Trouble shooting tipsdid not help. Apple is sanitizing its "ecosystem" of all things not paid to them. Got brief respite, 12 hours or so, by rebooting modem and router.

It's interesting that you noted the problem occurs around 6:00 pm PST. That's 1:00 pm here on the east coast of Australia, and that's about the time I've noticed this problem for each of the last three days. It persists until I go to bed but is resolved next morning.

I've had the same issue since the last update. I happen to have two Gmail accounts with two separate Google calendars tied to them. Both, separate accounts, are giving the same error. I can't believe the only way to solve this issue is what David Drahos suggested. I give him credit for coming up with what looks like may be a permanent solution. But I'd hate to go thru all that and have it do the same a week or two down the line. Let alone the time it's going to take to do it.

So I have been having this same issue since the last 2 weeks. I did a little playing around and here is what I found out:

1) For me the Apple Calendar "reads" all the events from both my google accounts, but when I add a new event using Apple Calendars, it doesn't appear on my Google Calendars. So I think it reads data from google calendars fine, but cannot write.

2) The issue doesn't happen on my iPhone which has the same calendars set up via iCloud.

So I don't think it is something that Apple has deliberately changed to discourage Apple users using Google Calendars like some have suggested, but more like something broken with Big Sur update.

PS: Does anyone also note Wi-fi issues after the Big Sur update. When I switch between my office and home wi-fi, I consistently face issues connecting. Sometimes a restart helps, but there is definitely some issues connecting to Wi-Fi networks.