Text message doesn't seem to be working well anymore in my messages app on mac. I've tried all the steps of disconnecting my imessage, reconnecting, disabling and reenabling handoff in settings. Before, a person's name in the To: field would show up green, showing that text messaging was working. Now they show up red and Messages doesn't want to send them. The odd thing is they still pop in to Message if the sender is sending me a text, but I can't respond. Messages seems to only think it can respond with an iMessage. Help? Thanks!