Open the Audio-Midi-Setup
It is a programm located : Applications / Utilitys / Audio-Midi-Setup
If you installed the driver of the Babyface correctly and the Babyface is connected it will show up there
In my screenshot it is not Babyface but Digiface

So far very good.
In your DAW in the preferences settings Audio Device, select Babyface for input device.
In your music project the track input can select Babyface input channels.
Open also the application Totalmix for monitoring audio
Watch Youtube videos about Totalmix, there are many
M1-Tahoe, Madiface Pro, Digiface USB, Babyface silver and blue