djm s9 recording on garageband

Im new to the mixer, love it so far. Unfortunately i still use garage band will be moving to abelton or something soon but i want to get some mixes done. the way i was doing it b4 was with aux in/out from my mixer rate ttm57 to the computer. (line1)

i tried doing it the same way with this mixer and i get no feedback. there is an option where you choose line 1 or 2 to record directly through Usb. but when i chose that option nothing happens either.

also im runinng the latest of el capitan if any of that matters.

and using serrate dj pro.

please help