IPhone and Mac messages don't sync

[NancyK]

Messages on my 2020 Mac with Sonoma 14.3.1 do not always sync with my iPhone 11.
I just updated my iPhone to 17.4.1, hoping that will solve the problem. Not.
Messages enabled in iCloud. Some messages always sync, others sometimes don't.
Thanks for any help you can give me.

 

[Rodananne]

Here is Apples's instructions on this. It worked for me some time back.

On your iPhone, go to Settings > Messages.

Tap Text Message Forwarding.

Note: If you don’t see Text Message Forwarding, make sure you’re signed in to iMessage using the same Apple ID on both your iPhone and your Mac.

Turn on your Mac in the list of devices.

If you’re not using two-factor authentication, a six-digit activation code appears on your Mac; enter this code on your iPhone, then tap Allow.

 

[MacsBug]

If you are texting someone that has an android device then the messages may not sync while the Mac is turned off of in sleep.

When this happens, in the messages app on your Mac you can go to the settings -> iMessages and then press the Sync Now button. That should sync any missed messages.