Recently, after upgrading to a 16-inch MacBook Pro, I noticed that Messages sent from my iPhone didn’t appear on my Mac, and vice versa. It took me a while to figure out the problem. However, I did. If you’re facing the same problem, here’s what you should do:
On your iPhone, open the Settings app. Scroll/swipe down to the Messages category and click it.
Select Text Message Forwarding.
You can now choose which devices you wish your phone messages to be shared with. In my case, it was Dennis Sellers’ iPad (2) and MacBook Pro.
This is all part of Apple’s Continuity feature. It allows you to: make and receive phone calls without picking up your iPhone; use your iPad to extend the workspace of your Mac; automatically unlock your Mac when you’re wearing your Apple Watch; copy and paste images, video, and text from your iPhone or iPad to your nearby Mac, or vice versa.