How to Fix iPhone/Mac Calendar Not Syncing Issue

Please help! I have sync issues with iCloud. My calendars on both Mac and iPhone worked fine separately. But somehow they stopped syncing. I can’t see the changes I made on Mac calendar through iPhone, let alone the changes I made on iPhone calendar through Mac. How to fix this problem? 

Generally speaking, if you turned on iCloud for calendar and logged in the same iCloud account on your iDevices, the calendars should be kept synced. However, issues like iPhone calendar not syncing with Mac or Mac calendar not syncing with iPhone do occur from time to time. If this what you are encountering, here in this post, we will show you several solutions for the issue.

Before trying the troubleshooting steps below, please make sure your iPhone and Mac meet the system requirements to use iCloud and the date and time settings on iPhone and Mac are correct. You can also try some simple methods like restart the Calendar app, restart iPhone or your Mac.

How to Fix iPhone Calendar Not Syncing with Mac

We have listed several solutions for iPhone calendar not syncing below, you can try them one by one.

Method 1. Turn off iCloud Calendar and Turn It Back on iPhone

When you can see no changes, maybe there is nothing wrong with your iPhone and Mac, it is just iCloud has its own schedules to do the sync. Why not try to turn off iCloud Contacts, Calendar or Reminders and turn it back later? It might be helpful for you to see the changes as soon as possible:

Open Settings > [your name] > iCloud > Toggle Calendars OFF. Waiting for a minute, then turn it on. (If you are in iOS 10.2 or earlier, please just go to Settings > iCloud > Slide to Contacts, Calendars, and Reminders, toggle the switch.)

Method 2. Set iCloud Calendars as Default

If your iPhone calendars are in iCloud, then it automatically updates your information. If you are using third-party calendar services like Google, for sure that these iPhone calendars would not sync to your Mac. You need to change the default account to iCloud:

To set an iCloud calendar as the default on iPhone. Tap Settings > Calendar > Default Calendar, then choose a calendar under iCloud, now you have set an iCloud calendar as default.

Method 3. Check the Calendar iCloud Settings

It happens a lot that people don’t select all calendars to sync. That is one of the biggest reasons why iPhone calendars not syncing with Mac or any other iOS devices:

To check your Calendar iCloud settings: Open the Calendars app > Tap Calendars on the bottom-middle of the screen > Click SHOW ALL to select all calendars on iCloud.

How to Fix Mac Calendar Not Syncing with iPhone

Basically, the solutions for Mac Calendar not syncing with iPhone are pretty much similar to the fixes for iPhone Calendar not syncing with Mac. What slightly differ are the operation steps.

Method 1. Turn off iCloud Calendar, Then Turn it Back on Mac

Turning off/on iCloud Calendar on Mac is also easy and simple:

1. Go to System Preference > Click Apple ID > Then tap iCloud. (If you’re using macOS Mojave or earlier, go to System Preferences, then click iCloud.)
2. Uncheck the box of Calendars, then select Delete from Mac, your iCloud Calendar is turned off.
3. A few minutes later, go to System Preference > iCloud, turn on iCloud Calendar and check if the calendars are synced to iPhone.

Method 2. Check Your Default Account

If you are using multiple accounts on your Mac, make sure that iCloud is your default Calendar account:

Open the Calendar app, choose Calendar > Preferences, On the General tab, make sure that one of your iCloud calendars is the default. After that, you might need to quit and reopen to set up correctly.

Fix iPhone/Mac Calendar Not Syncing Using AnyTrans

If the syncing issue is taking a long time to solve with the above methods. Here we recommend you a powerful tool – AnyTrans. Here are some main features that you may interest in:

• It helps users easily sync calendars from iPhone to Mac and vice versa.
• Besides, it enables you to selectively delete and manage your calendar data.
• Your data is secure if you choose AnyTrans for it is developed by trustworthy developers, so you don’t have to worry about information leakage.

And here are the steps to sync iPhone calendar to Mac:

Step 1: Download and install AnyTrans on your Mac, then connect it with Mac > Tap Device Manager > Click More from the category box.

Step 2: Find and click the Calendar icon to view all your calendars > Choose the calendar or select all> Click To Computer button to transfer to Mac.

Step 3: Once the transferring process is completed, you will see Transfer Completed Page. Click View Files button to locate calendars exported on computer. 

The Bottom Line

That’s all for how to fix iPhone/Mac calendar not syncing, please do let us know if these methods work for you by leaving comments. By the way, AnyTrans could also help you transfer calendar from iPhone to iPhone. Why not download it now and have a seven-day free trial.