iMessage on my mac says every contact is not registered with iMessage

Humm,

iMessages logs in to the iMessages servers on port 443.

It gets info back about the Contacts on port 5223 (somewhat like a jabber server but not actually one)

If your Firewall is On then port 5223 will be opened for Jabber (Google and Facebook chat amongst others).

Your router will always have port 443 open (You can't login in here to post without it).

It does seem that this issues is causing Apple some headaches to fix.

Ralph

Add me to the list of frustrated users. I have a MBP-r, iPhone 6, iPad Mini 2, a watch, all using a relatively new Time Capsule. Everything was working in harmony until about 2 weeks ago when the MBP randomly stopped sending/receiving iMessages. However, regular SMS's never stopped working, which baffles me. So, when an Android friend sends me a text, it pops up on all of my devices, including the MBP. But, when an iPhone friend texts me, it only pops up on the iPhone/iPad/Watch.

I've tried pretty much everything discussed on this thread and elsewhere. I did a full format and clean install of Yosemite yesterday, and did not use Time Machine or any system restore feature, and that did not yield any improvement. I'm waiting to hear back from a senior apple tech support guy, but based on what I'm reading here, I'm not optimistic.

Here's to hoping Apple is tracking on this issue.

Any update here?

I have this problem (red contact) on my Mac Pro. My iphone, iPad and laptop are all working perfectly.

I have even re-installed the OS from scratch to no avail.

I have tried every suggestion here.

There is no such setting -- Text Message Forwarding-- on the iPhone 6 plus. Anyone found a solution for the 6+?

Also, Ralph, I have been reading your hundreds of posts on this subject on several different threads. None of them have worked for anyone. You have just been leading people on a wild goose chase, apparently in an attempt to increase your point level. Please refrain and let some people who might really solve this into the thread.

FIXED IT!

I just experienced the same exact problem on my macbook about 30 min ago

I don't exactly know which one of these things fixed it but this is what I did:

(On my iPhone 6)

Settings > Messages > Text Message Forwarding > *turned it off for my macbook pro

(On Macbook Pro)

> Messages App

> On the top right of the screen I clicked "Messages" in bold font between the Apple logo and the File tab

> Quit Messages

> *when I clicked the messages app again it brought up the Messages setup window and I just had to login to my apple ID account and it enabled iMessages again, I even got a pop-up on my phone saying iMessages is being used on a new macbook pro.

> *sent a "hi" and it was blue and said it was delivered!

(Back on iPhone 6)

> *I then re-enabled Text Message Forwarding for my macbook, made me enter in a code that appeared on my laptop screen and the "hi" was synced to my phone now!

Oops, just realized people posted the same solution ahead of me, probably should have read those before experimenting on my own. I even made this account to post this 😟

This seemed to work for me, I was trying to get a message to a particular person and they have an iPhone so it should have worked previously. (Worked okay from iPhone 5 and iPad Air 2 to them). I'm not getting their name in red now so that's a start.

Still doesn't explain why the problem seemed to be completely random in who it would text to but hey, at least this is a fix!

Thanks very much.

Have later added this info that helped me out so the next person reading it doesn't have to trawl through a load of answers

On your iPhone, go to Settings/Messages/Text Message Forwarding and turn the switch ON for your Mac. A six digit code appears on your Mac, enter that on your phone.

Mine was working fine for the past 3 years until I wiped my drive the other day and re-installed Yosemite, and then it didn't work. But your solution is what fixed mine. Hopefully it will remain fixed.

For me the situation fixed itself about a week ago. I'm quite sure the issue was that my Mac Pro isn't officially supported by 10.8+ and was rejected by Apple's severs. I couldn't try the fixes that involve fiddling with settings on iOS since I don't have a iDevice.

But the other day it just started to work again. I didn't do anything special. I believe Apple changed something ont their servers.

I just solved this issue that showed up over the weekend after ... SOMETHING ... updated ... I'm not sure what. All I know is I had a lot of re-signing in to accomplish ... and all my contacts in Messages went red and nothing would send. I tried a lot of suggestions from this thread and nothing worked.

The fix ... I went into Messages - Preferences - Accounts ... and found the default account had been changed to Yahoo. I reselected the email account with "iMessage" under it and logged into that ... everything works now.

I think I solved the problem if it hasn't already been solved. If you click on message-preferences and then make sure both your email and phone number are clicked under "you can be reached for messages at." This solved the problem for me. Hope this helps.

I was having the same problem. What worked for me was going to settings>messages>Text Message Forwarding>MacBook Pro (Mac) and mad sure it was on. I have two MacBook's listed but I only have the one. I had a new logic board installed so I think it thinks it's a different Mac. Once I turned it on and entered the code from my Mac everything works perfectly. I hope this helps.

I have the same story. iMessage works fine on iMac and iPhone, but says to all contacts not registered in iMessage on my MacBook Air. All other stuff like FaceTime etc works good. Tried all the stuff from this page, but nothing helps. Unsolved problem for some years? Magic is the only solution?(

Hi

What do You mean by "present"? I have a serial number of board, and if I ask about it on any website providing info about model and hardware of my mac, all the data there is correct and exact. I tried NVRAM reset and the Safe Boot with no effect. All services work fine except imessages.

"One is the fact the app looks Logged in but each and every Contact goes Red and say it is "Not registered with iMessage" even if it is your own iPhone which is sending iMessages quite happily." - this is my yesterday situation. But today it says my own contact is "not registered in imessage" and "not delivered" to any other of my contacts (traing to send it via sms).

I've already contacted Apple Support and then with the Level 2 people who involved the Engineers and now I await any solution.

Level 2 person said he can see my MacBook is logged in all services (including iMessages), that is to say when I log in iMessage on Macbook my other devices informing me about it.

Also man from Level 2 Support said he has met this problem before and it was always hard and longtime solving with engineers..

Thanks for your answer.

This is interesting. I had my Logic board replaced last week and since then have been unable to get Messages working as it was before. It works perfectly on iPhone and I can also send 'Blue' iMessages to myself from the macbook to iPhone and visa versa. Everyone else is 'Green' Text Message. It's quite strange. If you enter the name of who you want to start a new conversation with, at the top of the messages window, it lists all their available addresses/numbers with 'iMessage' at the end. Wait a few seconds and they all turn to 'Text Message'. The text message forwarding works. Turn that off and contacts turn red. I have signed in and out numerous times, activated account, de-selected and re-selected messages in sys pref internet accounts, trashed the com.apple.iChat.plist and com.apple.imagent.plist. Pretty much everything I have read on here I have tried with no positive results. Calendars are syncing, FaceTime works, it's just messages that is definitely not happy. I have had different warning pop ups at various times as well. Sometimes it says 'Your message could not be sent. XXX is not registered with iMessage'. I have also been told by friends that they get that on their machines regarding me. I also had a pop up after restarting that stated 'An internal Messages error occurred' although that has only happened once.

I did not however get a pop up message stating to Contact Apple Support after the Logic Board replacement.

I'm pretty much at a loss as to what to try next other than to take it in.

Hi Ralph.

Many thanks for your response.

I followed your instructions. Serial Number is show as usual down at the bottom of the list above 'System Report' and 'Software Update' tabs. Clicking 'Version', as you said, gave me a 7 digit number in brackets but that was all. Should another 'Serial Number' appear close to this 'Build Number'? (Along with the one at the bottom? If so should they match?).