Troubleshoot Problems

Even the most well-informed user of Apple’s Calendar and Reminders can sometimes run into trouble, whether it’s iCloud data that doesn’t sync or disappearing reminders. Here’s how to solve some common conundrums.

How do I prevent Calendar spam?

It started in November 2016. Suddenly, Mac users were inundated with calendar spam—bogus event invitations (see Invite People to Events) from counterfeit companies hawking cut-rate Ray Bans, Ugg boots, and other supposed bargains, often in Chinese. Calendar spammers take advantage of the feature that scans Mail messages for calendar invitations and then sends you a notification.

If you click Accept, Decline, or Maybe, you notify the spammer that your account is real and ready for ...

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