Messages app on Mac

MBengtson wrote:

Somehow I turned off my messages app on my Mac. How do I turn it back on?

Please refer to: Change iMessage preferences in Messages on Mac - Apple Support which explains how to:

"Enable this account

Select to send and receive messages with iMessage.

For more details, see Set up your Mac to send text messages.

Enable Messages in iCloud

If you use Messages on more than one device, select this to store your messages in iCloud so that you can see the same text messages on all devices.

For more details, see Use Messages in iCloud."