iMessage Sync Issues Post Sonoma 14.0 Update

I am having overall sync issues accross devices. Messages not syncing between iphone & mac, facetime calls not ringing on mac, and notification has been a complete disaster.most of the apps not making any sound and haptics on iphone. Few are sending notifications on watch, few on mac and few on iphone. They are at randam. Cant find any pattern for these.

untidy, I'm going with their comment is just trying to start some crap with people. It's obvious that this problem exists with so many people. At this point I'm not sure that Apple is even looking to fix the problem. I personally have syncing work one day and not the next. Heck sometimes it can be minute to minute.

It's almost like the computer is not polling for message updates and it has to be pushed manually. I've seen similar behavior on macOS Ventura when I once returned from vacation and the Mac mini had to download a lot of messages from when I was gone. However, in this case, it seems like the computer isn't even trying.

I am having the same issue after the upgrade. Suddenly, My iMessages just stopped working. MESSAGE SEND FAILURE. I have tried everything. Nothing has worked. Hope someone can fix this. Some messages go through, most do not. Same for the iPhone and iMac.

I have this issue now anytime I send a photo with iMessage. It takes about 4 minutes. I have the latest updates to all my Apple devices. Sometimes even small size photos time out and I get the red triangle error.

Updated recently to Sonoma, and a number of my apps have gone walkabout, with Messages being the latest. Followed all of the same steps OP did. Still getting the message "MMS Messaging needs to be enabled to send this message." Definitely frustrated. Glad to know it's not just me.

Upgraded to 14.1.2 yesterday and imessage no longer sends attachments.

All my other apple devices work fine so it definitely points to sonoma being the culprit.

Have signed in and out of icloud, rebooted, re-synced, etc.

I was hoping the same imessage improvements found in the latest ios would also be available in the mac os imessaging but seems the opposite is true.

Since I updated to 14.1.2 on my iMac, messages and contacts are not responding. My iPhone (17.2.1) is set to send messages to both my iPad and iMac. Tried force quitting several times and reported but applications just not responding.

Any advice is welcomed. Thanks.

I'm on 14.3.1 and still iMessage it not syncing with iCloud. Even if I go into iMessage settings on my Mac where it is checked and click on sync now, won't show what messages are on my iPhone. So many bugs in this OS it's driving me mad.

I am having exactly the same problem for a few months now ever since the Sonoma 14.1 update. I have tried every single workaround that has been mentioned over and over again and nothing has changed. I was hoping the update of 14.3.1 would fix this but it hasn't.

C'mon Apple this is the fundamental reason you push buying multiple devices so that every product syncs......but it doesn't!

Please fix asap!!

Just to add one more Apple Eco user to the mix with the exact same iMessage sync issues and attempted the same fixes with no change. Additional issue is that numerous incoming email messages from Apple Mail (me.com and cloud.com) to to the 'junk' folder....had nearly zero before. Also spent at least 20 hours with Apple tech, at the store, senior advisors and sent in numerous 'logs'.....received one call back from one senior in over a four month period with no fix in sight and still no fix in sight. I've been with Apple since about 2002, even worked part time at an Apple Store. Seems both the attention to detail and the followup are, sadly, going down hill. Maybe too much attention on the 'really' new stuff, Apple TV+ and who knows what 'advanced' projects as the bread and butter devices, software, upgrades etc are taking a really back burner for attention. This issue of iMessages is ALL OVER the net with the same lame answer to 'check you sync'...clearly many inputs are not ever read or misread. Really sad!!

I have scoured the internet and these forums for a resolution to my problem of my iMac not syncing Messages with my iPhone and iPad without success. I have tried every conceivable suggestion so far and have given up. My iPhone and iPad happily sync together no problem, it's just the iMac that doesn't want to play after I uploaded the latest Sonoma update. Im going for a lie down and will wait for 17.4 and pray and hope that sorts out the issue.

For what it's worth my iPad and iPhone show I have approx 1700 messages in iCloud but my iMac as above shows ZERO. Nothing happens when I hit the "Sync Now" button. Not a shimmer or a shrink or expand and nothing else changes. Still shows 0 messages in iCloud, so it seems to me the Messages app on my iMac isn't speaking with my iCloud at all.

Additionally, I would work on my Mac at work and come home, and my book would be a mirror image of my work Mac. Syncing docs, emails, everything. It WAS the most efficient way to conduct business ever! But no longer. I hope they can fix this soon. Apple is the best, but this is a big disappointment! iCloud issue: more is affected than just messages.

I have the same or similar issue. On my Mac (Sonoma 14.4) I regularly have to manually sync iMessage to get rid of phantom badge notifications. Even with all messages read on all Apple devices, my Mac shows I have new unread messages (usually one). I've tried all the regular tricks including signing out of iCloud on my Mac and iPhone. It just keep happening and I'm fairly certain it began with the upgrade to Sonoma last year.

Non-arriving messages have nothing todo with iCloud sync, because they should appear on all devices anyway. iCloud sync for messages is only for backup and to have deleted messages removed from all devices (and for the government to be able to read them). Furthermore, iMessages aren't SMS, so most answers in this thread, including the so called "best reply" are off topic. In my case messages sporadically don't arrive on my Sonoma machine, especially after the device was offline for a short time. This isn't a problem with the other devices, even though iCloud sync is disabled on all of them, and I'm talking about real iMessages, not SMS. So thanks for nothing.