High Sierra won't send iMessages

Hi,

Try Signing In and Out (Quit in between).

8:45 pm Thursday; September 28, 2017

Hi,

In that case work through this Users Tip When the iMessages account will not Login

If you have to ring Apple there are things to remember:-

1) it will t sake a while.

2) Level 1 responders are looking are Apple Case issues.

3) Apple IDs are free to fix.

4) you have to get high enough up the chain to be able to get the person to actually check the server.

AS each device uses the Serial Number to identify itself the Block can be Device Specific. This means the ID may work in iTunes and the App Store and only Not Work on the Mac for iMessages.

8:19 pm Friday; September 29, 2017

Hi,

If the Apple ID is not logged in but is using the iPhone Number on the Mac to Receive at least it is possible that the link with the iPhone number will stay live to allow SMS to work.

All this needs is that at some point the iPhone Number and Apple ID were linked for SMS and then that the two devices on your LAN are still using the Apple ID for the SMS info to be forwarded to the Mac.

The reverse can happen on the iPhone whereby the Number gets deselected (not a User choice but know to happen now and then).

If the Apple ID is still a Receive and Send option then the iMessages get through via the "sync" copies.

The active link tends to be time limited when on device goes Off line.

The Users Tip details things you can try before phone Apple Support and moving up the chain until someone high enough can look at the server and say if your Apple ID use from your Mac is blocked.

The Serial Number makes it Device Specific and it also leaves other apps unaffected.

8:19 pm Saturday; September 30, 2017

HI,

Missing Users Tip link.

When the iMessages account will not Login

8:48 pm Saturday; October 7, 2017

Hi,

I am not using the iCloud > Keychain option.

7:56 pm Monday; October 9, 2017

Fair enough.

9:02 pm Tuesday; October 10, 2017

I have the same issue. I saw a post for an other OS in which bad (incompatible) Keychain entries was the cause of the problem. In that post, the Sr. Tech at Apple suggested deleting a number of Keychain entries. Post is located here: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&v ed=0ahUKEwixm5i6r4TXAhWM7oMKHee9A1oQFggo…

I have not tried it yet. I am out of town and cannot get to a full backup until I get home. Don't want to take the chance of deleting something I shouldn't without that backup available. 🙂

r/Jim

Hi,

Try this

Downloaded High Sierra yesterday. Today my Mac has stopped sending or receiving iMessages. Have tried resetting, signing in/signing out, rebooting, etc. What now?

8:44 pm Thursday; November 30, 2017

LogOut of your iCloud accounts, Messages;

Go to system preferences;

Then sign out:

Go to Messages preferences then click accounts, then sign out:

--- sign out >>>>

Open FaceTime and make sure it's not logged in...

Now, AFTER you've made sure you're logged out - Reboot or Power off computer, then allow it to boot back up and turn on these settings - it wouldn't hurt if this does not fit it to do a safe boot then retry, or you can do a safe boot next then boot back normally then turn on your iCloud accounts and log back in... Either way, make sure you boot before you try to enable the iCloud again.... I've fixed so many problems this way that just switching on and off would not repair, now it is my go to first step.

Apple have no idea what the issue is and this is happening to so many people, everything they have tried has not worked and now support have given me no option but to only use iphone to send and receive messages until they find the issue and they have no idea when that will be.

I have the exact same issue. Sending iMessages started immediately after upgrade to High Sierra. It has also worked fine before.

I see all incoming messages including sent iMessages from my iPhone on the Mac. It is only sending iMessages form the Mac that do not work.

My settings is similar Zedex70.

To add to the problem:

From time to time my account in Messages on the Mac is set as Passive even if the activate tick box still is set. If I then try to log out then I am not able to log in again for many hours. If this happens then FaceTime will not log in either.

At the moment I am logged in again. Receives all messages but cannot send iMessages on then Mac. It is working on the phone.

I tried almost everything. Så it must be a server problem, a bug in the High Sierra or my appleId in connection with iMessages.

There is a lot in the system log, but I do understand to read it and see if it mean anything.

Hope Apple will solve the issue.