Q: How do I find the code on MAC and iPad that is required to use Message forwarding so I can get my Messages on all devices?

Hello Suze2009,

Thanks for using Apple Support Communities.

I see that you'd like to use the iOS and Mac feature called Continuity to send SMS from your Mac.  For help with this, please follow the steps below.

SMS

With Continuity, all the SMS and MMS text messages that you send and receive on your iPhone can also appear on your Mac, iPad, and iPod touch. You can also reply to your contacts from whichever device is closest to you, including your iPad or Mac.

You can start a conversation in the Messages app or click a phone number in Safari, Contacts, or Calendar.

Set up SMS and MMS with Continuity

1. You need iOS 8 or later on your iOS devices and OS X Yosemite or later on your Mac.
2. Sign in to iMessage with the same Apple ID on your iPhone, your other iOS devices, and your Mac.
3. On your iPhone, go to Settings > Messages > Send & Receive. Add a check to both your phone number and email address. Then go to Settings > Messages > Text Message Forwarding and enable the device or devices that you want to forward messages to.
4. Look for a code on the Mac, iPad, or iPod touch that you enabled. Then enter this verification code on your iPhone.

Use Continuity to connect your iPhone, iPad, iPod touch, and Mac

Take care.