As you probably noticed when configuring iMessage on a Mac, you use an Apple ID during the set up process. This allows iMessage to sync all messages between any Macs and any iPhone, iPod touch, or iPad you may have using that same Apple ID. But this doesn’t always work as intended, and sometimes messages sent to the iPhone won’t reach the Mac, and sometimes messages sent to the Mac won’t reach the iPhone, and a myriad of other similar situations. If you find Messages to not be syncing properly between iOS and OS X, the fix is straight forward:
From the iOS Device(s):
- Open “Settings” on the iOS device and tap on “Messages”
- Scroll down and tap on “Receive At” which is usually followed by a phone number or email address
- Tap the “Use your Apple ID for iMessage” button at the top and sign in
Exit out of Settings and return to the Mac briefly.
From the Mac(s):
- Double-check the Apple ID used in Messages for Mac is the same as the iMessage setup in iOS
This problem seems to mostly effect users who set up iMessage on the iOS device a while back but based the delivery and caller ID on their phone number and not their Apple ID. Because Messages for Mac uses an Apple ID and not a phone number, the messages won’t sync. Simple cause, simple solution.
Similarly, if you discover that iMessages aren’t syncing between multiple iOS devices, be sure to use your email address and Apple ID as caller ID and all should be working as intended.
By Paul Horowitz - iPad, iPhone, Mac OS X, Tips & Tricks