I can't get iMessages to send from my iMac
I have an iMac running 10.15.3 and can't send iMessages. I can only receive them and see them after I send them from my iPhone.
Are the ones rec'd Green Or Blue?
https://support.apple.com/guide/messages/send-text-messages-icht35827/mac
Your Mac can receive and send SMS and MMS text messages through your iPhone when you set up text message forwarding. For example, if a friend sends you a text message from a phone other than iPhone, the message appears on your Mac and iPhone in Messages.
Note: To receive and send SMS and MMS messages on your Mac, your iPhone must have iOS 8.1 or later, and your iPhone and Mac must be signed in to iMessage using the same Apple ID. Additionally, you must set up your iPhone.