I recently bought my first Mac, after having been impressed with my iPhone 7 Plus for the past year. On my iPhone I can send both iMessages and text messages by switching on the "Send as SMS" option in Settings.
On my Mac the Messages app works great, except for when I want to send a message to a non-Apple user (most of my friends are on Android). When I try do do this I get an error like the one below:
I feel like I looked everywhere in System Preferences, but cannot find a "Send as SMS" option. Surely this is possible? How?