Mac Audio output

I start with Ardor 5 and I do not know too much about this kind of software.
I have a problem is that I do not have monitoring in the speakers of the MAC, it works very well by the sound card “EDIROL”, but impossible by the sound card of the MAC.
Can anyone help me by keeping in mind that I am starting
thank you
(Sorry automatic translation)

merci pour tout l’aide que je reçois