Text Message Forwarding Iphone Not Showing. Even if it was enabled previously, it's worth checking this again, because it's a very simple fix if this is all it is. Text message forwarding used to work just fine on both my mac mini, and my macbook air.
Toggling the button to the on position brings up the dialog to enter the code it claims it will show on the ipad. My iphone and mac are connected to the same icloud account and can receive messages at the same email. Go to messages > text message forwarding, and enable the device(s) you would like to forward messages to.