To search for contacts and content in conversations, click in the Search field in the top-left corner and enter what you’re looking for. Or, choose from the suggested contacts, links, photos, and more.
You can’t send a message to someone who’s Turn Mac screen sharing on or off.
When you share your screen with someone, you can also allow them to control your screen, which gives them complete access to your computer.
WARNING: Only allow people you trust to control your screen. They can do anything you can do on your computer—open apps, create or delete documents, copy files from your computer to theirs, and so on.
On your Mac, do one of the following:
If you received an invitation to share your screen: Click Accept in the invitation. A message asks if you want to let the other person control your screen, or just observe it. Select “Control my screen,” then click Accept.
If you want to initiate screen sharing: Invite your friend to View a conversation in Messages on Mac