Seems the log off log on from both worked for me
I had noticed that though my MAC had my phone number AND an email address to receive messages from.. iPhone DID NOT
So I logged out of imessage account on mac.
Logged out of imessage account on iphone
Rebooted iphone (just for good measure)
Logged back into imessage in iphone
Added the email address to imessage on the iphone (as it previously only had my cell number) Set cell as default
Rebooted because SMS forward was not on iphone still, rebooted again still not there.
Logged into imessage on mac... verified mac had the phone number AND email setup and that phone number was default.
Then bing bang boom. mac popped up.. detected iphone asked if i wanted to it to handle sms.. put code on iphone mac gave me and it worked.
I had tried 10 times trying to initiate the setup by starting on iphone and going under messages and enabling the text forwarding.. then imessage would pop up on mac and iphone would ask for a code. But nothing would ever happen.. no code.