1. In the Messages app on your Mac, choose Messages > Settings.

2. Click iMessage, then select Enable Messages in iCloud.

3. Select which email addresses and phone numbers you want to send and receive messages from on your Mac.

   Any messages currently stored in iCloud are now accessible on your Mac, and any new messages you receive on your Mac will be stored in iCloud.

4. To see Messages stored in iCloud, open the Messages app.

Note: If you want to turn off Messages in iCloud on your Mac, deselect Enable Messages in iCloud. You can choose to disable Messages in iCloud for all your devices, or just your Mac.

For more information on how to use Messages on your Mac, see the Send a message on Mac.