Why is my Calendar app not working after macOS Sequoia update?

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?



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MacBook Pro 16″, macOS 15.0

Posted on Sep 19, 2024 6:29 AM

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Posted on Sep 27, 2024 7:25 AM

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 !!!!!

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Sep 27, 2024 7:25 AM in response to ehatcher

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 !!!!!

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Dec 17, 2024 11:16 AM in response to ehatcher

Calendar freezes immediately upon attempting to edit an entry, regardless of which calendar event is on. Closing all calendars and trying to create a New Event also crashes Calendar. I also noticed that when I Force Quit Calendar, the system no longer presents me with the option to report the issue.

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Oct 9, 2024 9:55 AM in response to leroydouglas

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.


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Sep 30, 2024 8:14 AM in response to ehatcher

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.

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Dec 17, 2024 2:32 PM in response to Biker 1951

I have been able to add & edit all the events I need USING MY iPHONE. The changes and new events show up on my Mac, but I still cannot edit them. I have been able to add & edit all the events I need USING MY iPHONE. The changes and new events show up on my MacBook Pro, but I still cannot edit them. Extremely frustrating. I have an older iMac (27-inch, Late 2013, macOS 10.15.7 (19H2026)), which also syncs with iCloud. There are ZERO problems with Calendar on that machine. This is only happening on my MacBook Pro.

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Why is my Calendar app not working after macOS Sequoia update?

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