With macOS 10.14.1 we finally get Group FaceTime on the Mac. This matches up with iOS 12.1, so you can do group video calls and group FaceTime Audio calls with up to 32 people.
You can use this on your Mac with macOS 10.14.1 and you can call other Mac users as well as iPhone and iPad users who install iOS 12.1. The new feature detects the prominent speakers and brings them to the forefront of the video.
You can easily start a Group FaceTime call from a Group Message. When someone joins, they are instantly placed in the call and ready to chat. You can also see Memoji and Animoji from friends on the iPhone. These are private, encrypted calls that only the users can see.