Q: El Capitan iMessage Stopped Working (no handoff no text forwarding)

Hi,

If on the laptop all the Contacts turn red and get the "Not Registered with iMessages" or the Sent Message gets a "Not Delivered" response straight away then the Mac version is Not logging in properly

Try Signing Out, Quitting the app and then Restarting it and adding back the Apple ID as a first step.

7:36 p.m.      Wednesday; October 7, 2015

Mine began with my iPhone 6 and Yosemite when I returned from Italy October 6th. Then I upgraded my phone to a 6S and the new iOS, and then my MAC to El Capitan and I cannot for the life of me get it to work. I have tried everything, including 6 hours at the genius desk. Hopefully Apple will hear this and create a solution.

I've done this to no avail.

Hi,

On your iPhone in Settings > Messages > Send and Receive tap the Apple ID.

Is the Location set for Italy or where you are now ?

8:22 p.m.      Monday; October 19, 2015

Thank you for your response. I tried your suggestion, one that the genius bar and I had not thought about. I believe it was set to the US since I just upgraded and turned on this iPhone 6S last week. However, it did not work.  I am still unable to make it work.

Also, I am unable to connect my MAC and iPhone via Bluetooth. It keeps saying that the MAC is out of range when it is next to the MAC.

Hi,

I am also finding Blue Tooth is not seeing the iPhone even when it is connected for charging and under the edge of the Screen.

My Blue Tooth Magic Mouse is also dropping out. (it is charged at 50% when I do get it to work).

The Messages > Preferences > Accounts > iMessages account used to have a Details button up until Yosemite which was used to set the Country code on the Mac (for Messages).

I did notice that all my Contacts that in the UK have had +44 added to the phone numbers.

The iPhone place seems to be the only place that might effect this that you can change.

Several System Preferences on the Mac end have been tried.

9:28 p.m.      Monday; October 19, 2015

I went into my iCloud account and noticed that although it shows my devices, it says I am running the old iOS. I am going to see how to correct this information. Maybe that will help.

It might help.

9:33 p.m.      Monday; October 19, 2015

I'm having the same issue on my iMac  Messages keeps saying that the numbers aren't registered with iMessage. I'm having no issues with my macbook pro, however, 

I've spent 2 hours reinstalling Mavericks, resetting pram, deleting plists, signing in and out of all accounts, etc.  Does not work.  Very frustrating.  Is a phone call to Applecare still worth it here?

Also tried logging in with my wife's apple id.  same problem with hers (although works fine on her iPhone).

Hi,

The phone call to Apple Support is about all there is left.

There are at least two silent failures of the Mac to Login to the iMessages account on a Mac.

At OS X 10.8.2 the Messages app was updated to version 7.0.1

This required that the Serial Number was present on the Logic Board.  If was not there was  big pop up error alert with a code number and instructions to Contact Apple Support.

This proves that each device that Logs in does so with a Unique identifier and this can be seen in the Keychain as the IDS: appleID-Auth Token item.

It does seem that the idea is that this is used as a Security feature.

Failure to Login shows in at least two ways:-

1) All the Contacts turn Red when you try to enter their Details.

2) All Sent iMessages are quickly identified as "Not Delivered"

It also seem that post Upgrades (Yosemite to El Capitan for instance) there is an issue at this point when it reports it cannot login as well.

As each device (and in fact different apps) is logged in in the case of iMessages separately compared to the iPhone or iPad the ID will work in other Devices and in other Apps.

However you still need to state that it is an Apple ID issue (free to fix) when you contact Apple Support.

Most Level 1 people have not heard of it.  They are script led and trying to find Software and  Hardware issues covered by Apple Care.

It seems that Level 2s are keen (if not Instructed) to bump the issue to engineers after trying to get you to do more testing.

Politely insist that you want the Apple ID reset on the iMessages server for the Mac.

The logic says that this is a security feature to prevent anyone else logging in as you.

However for some reason it seems over zealous locking you out when you have not done anything.

8:10 p.m.      Wednesday; October 21, 2015

Hey there,

First time posting to this site - I found a fix that worked for me. My iCloud ties various emails together (i.e. ****@me.com @icloud.com @gmail.com etc).

The following fixes 2 scenarios:

1. Your contacts are all in red and their status appears as offline

2. Your iMessage accounts shown in the Buddy window will not connect to an Available status and remain as offline - furthermore, the app asks for your password over and over again and again without connecting - even after you enter the correct password for your account.

Login to the associated Gmail account on a web browser

Navigate to https://www.google.com/settings/security/lesssecureapps

Turn On

Open your iMessage - navigate to the Buddy window. Click on the account that is offline and change the status to Available. This account should now connect. Yay!

    for the      Points.

8:02 p.m.      Thursday; October 22, 2015