The audio 2 is not suitable for recording, it is a two-channel out / 0 channel in sound card. You can plug the rec out output on the djm 800 to the mic/line input on the mac with a rca to p2 stereo cable and record using audacity or similar software. BEWARE! you should check out if your mac input supports line level audio. If it supports only 'mic level' audio input your signal will be too hot and will result on distorted recording and other problems, so I won't recommend it at all. The best option is to buy a audiocard with "line level" inputs.