Text Message Forwarding Not Displaying MacBook Pro

You say your two machines are named "MBP old" and "MBP new".

You then proceed to describe only one MBP under "Devices used".

Further, you refer to "MBP" in steps 1 through 3.

So it's hard to tell if you're talking about the old one, the new one, ...

Anyway, be sure you've done what is suggested under "To use continuity for SMS and MMS ..." here:

Connect your iPhone, iPad, iPod touch, and Mac using Continuity - Apple Support

If that happened to me, I would go to System Preferences > iCloud and sign out and then sign back in on the "MBP new".

Ive got that problem since upgrading to 10.10.2 plus imessage does not work on the mac anymore, I get message saying contact is not registered with iMessage for all my contacts.

I'm having a similar issue as Yashar_S. I have an iPhone 5, a 3rd-gen iPad, a mid-2009 MacBook Pro, and an iMac 5K. All are running the latest os, as appropriate (iOS 8.2. OS 10.10.2). All are logged into the same Apple ID, have the same listing of phone number and email addresses for iMessage, etc. On my iPhone, under Text Message Forwarding, I see my iPad, but only *one* of my computers -- whichever one was the last that I logged out-then-back-in to iMessage.

Before this latest Yosemite update, my iPhone would list two computers, but they would be duplicate listings, though only one of the listings would work. In order to have the iPhone recognize the new iMac, I had to put my MBP to sleep (or shutdown) -- it wasn't enough to log it out of iMessage.

So I'm wondering if the "fix" to the duplicate listings issue was only a partial (i.e., cosmetic) fix and not the true, complete fix at all?

Sigh!

I have a similar set-up as you, iphone 5s, ipad mini, 2013 Macbook Pro, iMac 5K. I've been over this with Apple Support several times, and they have me log back out and log back in on all my devices. My iphone can see more than one computer temporarily but eventually it either chooses the iMac or Macbook Pro (which as you said correctly is whatever device you last logged out of, then logged back into iCloud). The ipad is always able to get text message forwarding. I think the iphone text message forwarding feature can only recognize one computer, whether it be an iMac or a MBP. Still, I thought the whole point of having iCloud on multiple devices was so that everything could be handed off or shared, even on more than one computer. Just hope the next iOS or OS X update addresses these issues.

sberman wrote:

If that happened to me, I would go to System Preferences > iCloud and sign out and then sign back in on the "MBP new".

Nope this is wrong, you need to go into Messages App on your MBP NEW and sign out and then sign back in.

Actually, the original poster said when he posted his question (six months ago) he had already tried your suggestion and failed.

Signing out of iCloud on my MacBook and back in again did it for me!