Change my phone number on Mac

Messages help.

For iMessage, you need an Apple ID. If you set up an iTunes or iCloud account, you already have an Apple ID. If you don’t have an Apple ID, you can create one in Messages.

If you have a message account with Google Talk, Jabber, or Yahoo!, you can add these to Messages too. See Add Internet accounts.

Open Messages for me

1. Choose Messages > Preferences, click Accounts, then select iMessage in the Accounts list.
2. Enter your Apple ID and password, then click Sign In.If you don’t have an Apple ID, click Create Apple ID. If you forgot your password or Apple ID, enter anything in the Apple ID field, then click Forgot Password?
3. After signing in, do any the following:
   • Specify the email addresses and phone numbers that receive messages: Click Add Email, then enter email addresses. Select the email addresses and phone numbers you want to use to receive messages.If you have a phone number associated with your Apple ID, it is automatically added to the list. When you set up your iPhone to use your Apple ID, your phone number is associated with your Apple ID.
   • Have others notified when you have read their messages: Select “Send read receipts.” If you enable read receipts, people who send you messages will see when you’ve read them.

Hi,

The simplest is to add the Apple ID to the current iPhone then Accept the pop up on the Mac.

Then go to Preferences > Accounts > iMessages and untick the old phone number.

To remove it though means going to ~/Library/Preferences and deleting com.apple.ids.service.com.apple.madrid.plist at least.

It is better to remove all the ones with IDS in the name. (this is because some info seems to bleed back to the madrid one.)

To remove them Drag them to the Trash and restart Messages. You will have to re-add the Apple ID and accept the pop up from other devices.

9:59 pm Sunday; June 7, 2015