iMessage on MacBook Air
How can I send messages from my phone number instead of my email?
Question marked as
Best reply
There are several things that can be shared across various products in the Apple line.
• Use Continuity to connect your Mac, iPhone, iPad, iPod touch, and Apple Watch - Apple Support
This article that covers most under "continuity" has specific info to address your question.
Settings may have reference under more than one topic from this Support theme portal.
Good luck & happy trails!🌞