ChatMate for Facebook

ChatMate for Facebook screenshots

Use Facebook Messenger right from your macOS desktop.
ChatMate for Facebook 4.3 : Your Story

Alternative downloads

ChatMate for WhatsApp
4.3.1
Allows you to communicate and share files with others.
JBuddy Messenger
3.3.120412
Java-based chat client. If you need to communicate with contacts on several public IM channels simultaneously and don't want to clutter your desktop.....
Messenger Native
1.0.0
FREE
Chromeless & frameless window wrapper around the Facebook Messenger app.