ఈ కంట్రోల్ను మారిస్తే, ఈ పేజీ ఆటోమేటిక్గా అప్డేట్ చేయబడుతుంది

Forward a message or attachment on Mac
You can forward a message (or an attachment such as a photo or video) from a conversation.
Go to the Messages app
on your Mac.
Select a conversation.
Control-click the message or attachment, then choose Forward.
Add a recipient, then press Return.
The message or attachment is sent.