
On the surface, it does everything you’d want it to do. It’s built into every Mac, and it syncs with iCloud, Google Calendar, Yahoo, Exchange, and general CalDAV servers. Of all the calendar apps on macOS, Apple’s built-in calendar is probably the most widely used. So let’s get down to it: what’s the best calendar app for the Mac? Apple’s Calendar I keep all my tasks in a separate app, so I only use it for appointments. I have my way of managing my calendar, and that will undoubtedly skew my opinions. Like I always say when I write articles like this, this is purely based on opinion for me. Others only have their official meetings. Some people like to manage all of their tasks from it.

I know that everyone uses their calendar in different ways. What’s the best calendar app for the Mac?.I did review your help articles, but I can't find the solution for this problem. Can you help escalate this, so it can be fixed for many of your customers? I'd love to use my new Apple device as intended! My iPhone also does show this error which leads me to conclude that this malfunction could be a glitch with the latest macOS 11.2.1 software as another commenter on this thread has suggested. This does affect functionality I added an event to the Google calendar on my Mac, yet the event won't sync/show on my iPhone.

This does not solve the problem once the Google calendar populates and appears to be working again, the error reappears after some time. I have removed and re-added the Google/Gmail account a few times now through System Preferences. I called Apple Tech Support, and they did not have a solution. This isn't happening to any of my other e-mail accounts.

I'm seeing the same error message for my Google Calendar while inside the Calendar app. I just purchased a new MacBook Air (M1 chip) and used Migration Assistant to transfer over from my old Air a little over a week ago.
