How to Fix iPhone/iCloud Calendar Not Syncing with Mac in iOS 11

Q: "Recently, I have met an iPhone syncing issue. I have updated my iPhone 7 Plus to iOS 11.2 for a few days. In the beginning, everything works well and the calendar on my iPhone can sync to iCloud properly. But somehow they stopped syncing at this morning. I can’t see the data update on my Mac through iPhone, let alone the changes I made on iPhone calendar through Mac. How to fix this problem?"

iPhone calendar not syncing with Mac after iOS 11 is one of the most frequent problems related to iOS update, and other issues appear on iPhone are iOS 11 screen recording not working, iPhone alarm/notification/flashlight not working and more. Generally speaking, when you sign in the same iCloud account on both iPhone & Mac and enable the iCloud service for calendars, all the info and changes on calendars will be kept synced automatically. However, some users are suck on iPhone calendar not syncing with Mac now and then. If you are one of them, check the several solutions in following texts.

Part 1: How to fix iPhone calendar not syncing with Mac in iOS 11

We have listed all the possible solutions below to assist you in fixing iPhone calendar not syncing with Mac. If you also need the guides on iPhone contacts not syncing to Mac, you need to skip to another page.

1. Turn off/on iCloud for calendars

If the iPhone calendar not syncing with Mac caused by iCloud itself, you can try to turn off iCloud for contacts or directly turn off the whole iCloud service and turn it on again.

Go to "Settings" > tap "YOUR NAME" > turn off iCloud for "Calenders". Wait for about 3o seconds and toggle the switch on again.

2. Set iCloud Calendars as Default

If you are using some third party calendar service like Google, Outlook or Exchange, the iPhone calendars won’t sync to your Mac. You need to change default account to iCloud.

Go to "Settings" > "Calendar" > "Default Calendar", then choose a calendar under iCloud to set an iCloud calendar as default.

3. Check the calendar iCloud settings

If you haven’t chosen to show all calendars under ICLOUD in Calendars application, the iPhone calendar won’t sync to Mac and you can see any change.

Open "Calendars" app > tap "Calendars" in the lower middle of the screen > tap "Show All" at the lower-right bottom to see if all calendars are selected under ICLOUD.

Part 2: How to sync data from iPhone to Mac when iCloud syncing not working

When you meet such kind of iPhone syncing problem and you can’t fix it timely, you can consider taking an iCloud alternative to help you transfer data from iPhone to Mac with ease. Here, in this part, we will introduce you an ultimate iPhone data transfer tool - EaseUS MobiMover Free to transfer calendars between iPhone and Mac/PC. If you need to back up iPhone text messages to computer, put music to your new iPhone X/iPhone 8, export iPhone contacts/music/photos/videos/audio/book/Safari to the computer, MobiMover Free can fulfill your needs in a completely free method.

Step 1. Connect your iPad to your Mac with a USB cable and tap "Trust This Computer" on your iPad if you are asked > Run EaseUS MobiMover for Mac and choose the "Phone to Mac" on the main screen > Click the "Next" to continue.

Step 2. Then, MobiMover automatically reads and loads all the supported data on your iPad as the screenshot shows below. You are free to send them all or selectively export one data type at a time. Besides, you can set the destination for saving exported iPad files on your Mac. If you don't customize it by yourself, MobiMover will send them to a desktop folder named by Exported by MobiMover.

Step 3. Click the "Transfer" to import data from iPhone or iPad to Mac. When the process has completed, you can view, edit, or delete them as you want on your Mac.