Messages not working on Mac since upgrading to Sequoia 15.4

I am having the same problem immediately following the upgrade. It is only allowing me to send SMS to my contacts from my computer and frequently they do not go through (failed delivery). I've checked every setting as discussed here. No issues from the iphone, but synching and sending is intermittent and limited to SMS from my computer.

Want to bump this. It's driving me nuts.

I tried syncing across my devices, enabling iCloud.

I can send messages on Mac, but it won't appear on iphone. None of the messages sent to me appear on mac.

Since upgrading to 15.4 messages not sending at all.

I'm on 15.4.1 and am just now experiencing this issue. Tried everything everyone has mentioned in this thread, no change in state.

I am having this exact same issue. I have tried every recommended solution but nothing is working.

It’s been roughly 2 weeks for me now. Spoke with 3 different Apple reps on the phone, no fix yet. The last thing we did was screen record the issue and sent it to their engineers. I am waiting for resolution

I'm having the same issue. It's been intermittent prior to the update—one of the recommended fixes was making sure both of your devices were updated. Now, the messages will not send or update from my Mac on Sequoia 15.4 at all. This is driving me insane. I paid so much money for these devices and a HUGE part of the sell is the "Apple ecosystem". I can find threads from YEARS ago where people were having issues. HOW has this not been resolved???????

EDIT: now the app won't even open on my Mac. I keep getting "Force Quit: Application Not Responding".

Hi Just called Apple and a great tech person--had me go to settings, iCloud, messages, and hit sync. This reset things and all is working perfectly now.

Same here on a 2019 MacBook Pro. I am disappointed to see this hasn't been resolved and has been a problem for a month now.

This problem arrived when I upgraded to 15.4.1. I tried switching to text message forwarding to no avail and then back to Messages in iCloud. Nothing works. All RCS/SMS messages simply fail. This is SUPER annoying, I rely on this functionality.

NO! I just updated to 15.4.1 last night and it's definitely not fixed.

Same here.. in fact, I think it might actually be worse. The application just gets stuck now and gives the message "Application Not Responding"

Try going manually to Messages settings on Mac, and, on the section iMessage, click on "Sync now". If this doesn't work, try uncheck Messages in iCloud settings both on your iPhone and Mac. If none of this work, try log out of your Apple ID on your devices and login again.