I recently rebooted an OS X machine on which I had an ongoing conversation in Messages via text with a phone number on a non-iOS phone. Now, though I am able to continue sending texts from Messages on iOS to exactly the same number, I can no longer send texts to that number from Messages on OS X, instead messages fail to send, the two conversations are no longer synced between OS X and iOS, and I'm told that the "phone number is not registered with iMessage".

How do I get OS X Messages to remember that I can, in fact, text that number?

  • I would try the steps noted here: macrumors.com/2014/11/06/text-messages-phone-calls-on-your-mac Go through and turn text message forwarding off then on again for that device, and then proceed from there. A few good troubleshooting tips at the bottom of the page, too.
    – smoooosher
    Commented Apr 21, 2015 at 17:41
  • 2
    in your phone, under settings -> messages -> text message forwarding is your mac listed and active?
    – Matte.Car
    Commented Apr 21, 2015 at 17:42
  • @Matte.Car: Incredibly (typically? frustratingly? Apple-ly?) no. The reboot of my Mac apparently disabled this setting on my iPhone. Hurray for security!
    – orome
    Commented Apr 21, 2015 at 17:49
  • Strange, it never disabled for me...
    – Matte.Car
    Commented Apr 21, 2015 at 18:09
  • @Matte.Car: Weird stuff like this happens more and more.
    – orome
    Commented Apr 21, 2015 at 18:52

3 Answers 3


Check "Text Message forwarding" under phone Settings > Messages > Text. This must be on (and your iOS device and OS X machine must be on the same network) for text messaging from Messages on OS X to work.

(It's possible this was disabled disabled for his Mac after a reboot.)


Not sure for txt, but if that happens for iMessage, then reselecting the 'correct' number from the To: someone header above the text area [even if it looked right to you in the first place] can make it have a rethink.

The area would show as red before, blue or green after 'fixing'. If 'no fix' is required then there is no colouration to that part until clicked on.

I don't have a red example right now…

enter image description here

Also, make sure their number in your Contacts is not listed as iPhone - mobile or cell should be OK.

  • Yes, that's what occurred to be to try first. But it doesn't work. It thinks things are fine for a second (or claims to think it does) and then fails again as before.
    – orome
    Commented Apr 21, 2015 at 17:38
  • I had one number on my phone last year that went like that - but this was before SMS from Mac capability, so I'm not sure what's changed in how the Mac 'thinks' of the contact info, sorry. apple.stackexchange.com/questions/148579/… but there was no resolution [it was 'fixed' when they actually bought an iPhone]
    – Tetsujin
    Commented Apr 21, 2015 at 17:43

On your computer, use AIM (AOL instant messaging, aim.com . it synchs with Imessages (just add the account), and it is happy with phone numbers. Enter the phone number there.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .