Messages not working on Mac since upgrading to Sequoia 15.4

I am having this issue as well. It started after I updated my Macbook pro 16" M1 Pro to Sequoia 15.5

Ditto! I just had to get a new MacBook Pro and it's on 15.5. Also not working! Iphone messages are fine. Messages with people on other phones and different carriers, not so much.

Has anyone tried simply reinstalling the OS (Sequoia, in my case)? My iMessages stopped working after being fine for a few months.

I'm going to reinstall later today.

MOHAMEDHAM

#MOHAMED

Tried and no dice

Same exact issue. I've sign out and back into iCloud, etc. etc. etc. Everything is grayed out on that panel of Settings, and it's just spinning and spinning....

Having the same issue following the update :/ Even when I "sync now," only some of my messages will load! So frustrating.

I'm having the same problem and also tried rebooting my mac, signing out and back in to my icloud account, checking to make sure it's the correct and corresponding account. I made sure my settings were all good to go on my phone and on my mac.

The most I've been able to have happen is that it seems to send/receive extremely delayed texts (1-2 days after I've received them on my phone).

**TEMPORARY FIX**

Just spent 45 mins on the phone with Apple support trying to fix iMessage not syncing or sending on my Mac. After jumping through a bunch of steps (including deleting some system library files), they had me create a brand new user profile on the Mac and sign into iCloud/iMessage there. Surprisingly, everything worked perfectly under the new profile—so it seems like the issue is tied to something corrupted in my original user account. Waiting to hear back from Apple Engineering, but in the meantime, if anyone else is dealing with iMessage issues, try testing it on a new user account. Curious if anyone’s had luck fixing it without having to switch profiles completely.

I made my secondary profile an “admin” as well by giving admin authorities. It’s annoying to switch between the two when I need a file from that account, but it still makes work flow overall much easier with iMessage working on the secondary profile

so i upgraded to 15.4.1 last night and experienced the same problems as discussed here. checked all settings etc. no luck. all a sudden this morning imessage started working. not sure what changed. just wanted to share in case it magically started working for others.

Same. Blank gray image preview boxes load under GIF. When I click a gray box, a pop-ip appears, :“CFNetworkDownload_8swf1H.tmp” couldn’t be moved to “Could Not Share Image

Caches” because either the former doesn’t exist, or the folder containing the latter doesn’t exist."

**Fix** I had to `force quit` from `Activity Monitor`. Then restarted iMessage and it comes up as expected.

Note: When I did this via right-click on the dock and clicking `force quit` - that did not work.

Having the issue on my new MacBook Air M4, just purchased this week as well as my iMac and macMini. My iPhone works fine. Funny how it shows message fails to send but when checking on my phone it has gone. Recipients in the group all receive the message despite saying not delivered error. They are all using Android phones. This never happens when sending to an iPhone.