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Since installing Sequoia OS yesterday my computer is freezing and I cannot use calendar app - any suggestions on how to fix or uninstall and revert back to my old OS?
[Re-Titled by Moderator]
MacBook Pro 16″, macOS 15.0
Same here, Sequoia upgrade broke my MacOS calendar. I’m not using any 3rd party calendar integrations just the native Apple app. I have iCloud calendars and Goggle calendars synced to it, nothing fancy. App still opens on weekly view but when I try to scroll to the next week the app freezes up, the beach ball runs for a few sec then the app quits and I get the black terminal window type message about a critical error. APPLE, please fix this asap !!!!!
Same here, Sequoia upgrade broke my MacOS calendar. I’m not using any 3rd party calendar integrations just the native Apple app. I have iCloud calendars and Goggle calendars synced to it, nothing fancy. App still opens on weekly view but when I try to scroll to the next week the app freezes up, the beach ball runs for a few sec then the app quits and I get the black terminal window type message about a critical error. APPLE, please fix this asap !!!!!
Quit syncing with iCloud. Once you do this calendar should open. Then turn on calendar sync with iCloud again. That is what worked for me.
Just putting my 2 cents in too. My iCal also wont open. Get a terminal error. There is a problem with the Sequia update. Apple please fix!
I am having the same issues. If I edit items or put new items in my calendar it freezes. This occurs on my Mac, but also in the calendar on my iPhone 14 Pro. Please fix asap!
As far as I can tell it is unique to icalendar. I have had to force quit each time and am unable to edit any calendar items or even add any. It just freezes and spins. Rebooted and worked with Apple to check disk repair to no avail.
I spent 3 days with Apple Care assistance trying to fix and luckily I had backed up my system prior to updating to sequoia so ultimately I was able to rebuild my computer back to Sonoma OS version. I didn't have anymore time to mess with it as I was leaving on a 2-week cruises and needed to restore it. Removing the Sequoia update & restoring to Mac and bringing everything from backup seemed to fix things on my Mac however still had a problem with my icalendar on iPhone and ultimately had to delete the calendar app on iPhone and then reinstall it after I sync'd my phone to my mac. Now everything is working as it should using Sonoma. I will not be updating to Sequoia until I don't see any issues posted as the was a headache I didn't need right before leaving on an extended trip.
For me its not just iCal, I'm experiencing numerous issues! Worst update ever.
My Mac Mini does not freeze, but Calendar crashes every time I try to open it, since I updated to Sequoia... Very annoying!
Not only is mine locking up, but I don't have any of my calendar events on it. HELP! I live by my calendar. Thanks.
Me too. Adding my experiences so Apple devs can troubleshoot this. I have multiple connected calendars including Exchange and iCloud. Everything worked as expected before Sequoia, reliably and consistently. After Sequoia the following happens consistently: 1) invites takes a very long time to appear in the calendar (like an hour), 2) it is virtually impossible to add a new meeting manually to the calendar. Edits show in the meeting but do not move to the calendar view, including the event name, the selected calendar color, etc., 3) when editing an existing meeting the app freezes until the edits are discarded or the meeting being edited is deleted.
In my case, that was a subscribed calendar with the NFL matchups. I deleted the calendar
ehatcher wrote:
As far as I can tell it is unique to icalendar. I have had to force quit each time and am unable to edit any calendar items or even add any. It just freezes and spins. Rebooted and worked with Apple to check disk repair to no avail.
The problem is most likely caused by 3rd party software trying to interact with Calendar.
In my case, it was a subscribed google calendar that caused the crash. As described above, I stopped synchronization in iCloud, then reactivated it and subsequently deactivated all calendars in the Calendar app (by unchecking them). After that, I gradually reactivated the individual calendars, and one calendar stood out that caused the app to crash.
Big_Mac_Fan wrote:
Same here, Sequoia upgrade broke my MacOS calendar. I’m not using any 3rd party calendar integrations just the native Apple app. I have iCloud calendars and Goggle calendars synced to it, nothing fancy.
It did work .... initially. Tried closing the app and re-booting you Mac since ? when I did that, I was back to square one, "crash city". APPLE: this is a bit embarrassing for you, please fix this !!!
Why Is my Calendar App not working on macOS Sequoia?
