Assuming that your using your laptop only as USB storage device and not your 2000nxs in HID mode with rekordbox DJ. The most simplest way to record a set is:
1. connect your DJM via USB to your laptop
2. go to system preferences > audio > input and make the DJM-900nxs as your default input device. If it's not on the list, then you may need to install the drivers for your DJM.
3. open Quicktime > file > New Audio Recording
4. adjust the channel trim levels on the DJM that the 2000nxs are connect too.
That's pretty much it for basic audio recording.


