There’s an odd little problem with the macOS Calendar app that I’ve run into a number of times, both personally and during my years as a Mac consultant. Sometimes an event will be duplicated over and over, often filling a day on the calendar with copies of the same exact event. There’s a way to fix that problem once and for all…
Download macOS High Sierra for Free. To download macOS 10.13 High Sierra you have to click on the link down below. Before downloading and installing macOS Sierra 10.13, keep in mind that this is not the final version and it is developer preview 1. I highly recommend you to install on a separate disk or in a Virtual Machine. My Google Calendar account has stopped syncing with the Apple Calendar app on macOS (High Sierra 10.13.4). I've tried turning Google Calendar off and back on in the System Preferences - Internet Accounts panel and i've tried removing the account from the Calendar app. Neither have made any difference. I don't see anything unusual in the system.
Before we delve into the fix, let’s talk about some of the situations that seem to cause this issue. In my case, I use both iCloud-synced calendars and Google calendars. Some of these duplicates come from those Apple special calendars that you can subscribe to — U.S. Holidays, Birthdays, and Found in Mail. Most of the time, the duplicates will only appear in one or two calendars, and only on one device. For one of my clients a few years ago, the problem only happened on his MacBook Air, not on the iMac he had in his office nor on his iPhone.
One of the most frustrating things about this issue is that deleting those extra events never helped. They’d be gone for a few minutes, but would quickly start showing up again. I’d even try things like force-quitting Calendar and then restarting the Mac or deleting and then re-adding the calendar accounts, but none of those worked for long.
After digging through the Apple Support Communities for a while, I finally came upon a solution that worked. Here’s what you need to do:
Proshow gold 9.0. 1) Delete all calendar accounts from Calendar and macOS. Go to Calendar > Preferences > Accounts, click on each account in turn, and click the minus sign ( – ) to remove each calendar (see image below):
Removing Calendar accounts2) Quit the Calendar app (Command-Q or Calendar > Quit Calendar from the menu bar).
3) Open a terminal window, then delete all calendars and Calendar preferences. If you’re not comfortable with the terminal app, find a friend who has the necessary knowledge and ask them to do it for you.
Terminal commands surrounded by green box4) Quit terminal.
5) Launch Calendar
6) Add your accounts back to Calendar. This is done by opening Preferences > Accounts, clicking the plus sign button, clicking on the calendar provider (iCloud, Exchange, Google, Facebook, Yahoo, Aol or other CalDAV account), then adding the appropriate account and password information.
7) Uncheck (hide) additional calendars from the Delegation tab. This ensures that only the primary calendar that you’ve added is viewable, not other calendars to which you may have been added (see image below):
Hide each calendar in the Delegation tab8) Allow the download and sync of your cloud-stored calendar events to finish, and you’re done.
So what causes the duplicates? Google changed the way it supported CalDAV (Calendar Extensions to Distributed Authoring and Versioning) and multiple calendars a few years ago, and it’s thought that Calendar didn’t exactly work well with that new process. Through the various versions of Mac OS X and now macOS that have been released since that time, the issue still shows up on occasion.
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So you want to share an iCloud calendar with someone, huh? It’s certainly handy to do so with your spouse or coworkers, and it’s simpler than having to pass around the details of events or send invites to folks every time you schedule an appointment.
There are quite a few ways you could go about it. First, you could open the Calendar program on your Mac and hover over any of your calendars in the left-hand list to reveal a sharing icon:
Don’t see a list? Select the “Calendars” button on the toolbar.
Click that, and you’ll get a little pop-up where you can enter the recipient’s name or email address.
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Note that you can select “Public Calendar” to share your events in a read-only format with anyone, but if you don’t want to make your calendar public, your recipients must have an iCloud account for this to work. That’s kind of a bummer, but at least the accounts are free, right?
After you enter the person’s email address, click “Done,” and you’re…well…done! The recipient will receive an email that looks like this:
Macos high sierra plex wake for network. Secondly, you can share a calendar through the iCloud.com Web interface. After you visit that page and log in, click on the giant “Calendar” button. Then you’ll see the same list of your calendars along the left side. Select the sharing icon next to any of them to follow the same steps I outlined above.
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Finally, if instead you’d like to share a calendar from an iOS device, that’s easy, too. Open your Calendar app and touch the “Calendars” button at the bottom to reveal the list of the ones you’ve got:
Then you’ll touch the button next to the one you want to share.
On the following screen, touch “Add Person” to enter someone’s email address as we’ve done before.
And if you ever want to revoke someone’s sharing privileges, all you’ve gotta do is go back to that same sharing icon within Calendar on your Mac, on iCloud, or on your iOS device and remove the associated email address. From there, you can also make it so the person in question can only see your calendar and not make changes to it.
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Groovy! So no matter what method you pick for sharing calendars (or for revoking someone’s access), it’s pretty simple. Now, can we all stop using calendar invites? Pretty please? It’s not that I hate them, it’s just…OK, I hate them. An irrational amount.