Open Messages for me
Go to the Messages app Continuity features and requirements on Apple devices.
If you forgot your Apple Account password, or if you need to create an Apple Account, go to the Add or remove your phone number in Messages or FaceTime.
Send read receipts: Select this option so that people who send you messages can see when you’ve read them.
You can also notifications (such as sounds and alerts).
To see your messages on both your Mac and iPhone, make sure you sign in to the same Apple Account on both devices and turn on Text Message Forwarding on your iPhone. See Send a message on MacApple Support article: If you can’t turn on or sign in to iMessage or FaceTime