Message app on Mac won't send text
I had this problem before and I cannot figure it out again. Nor can I see post that I posted months ago. I think it possibly has happened due to upgrades with my OS and iOS along with resetting my settings on my iPhone. None of this should have affected it but the fact remains I CANNOT SEND TEXT FROM MY iMAC! Please HELP AGAIN!!!!!
iMac 21.5", macOS 10.14