This guide is for Rekordbox but may work with other DJ software if it supports setting your master out device.
Step 1 – Update
Ensure that you are running the latest version of rekordbox, that your drivers and firmware are up-to-date, and that your broadcast software is current as well.
Step 2 – Download the Necessary Software
There is just one extra tool necessary for us Mac users: BlackHole
Install it and that’s it – there is no application icon, it will appear only within the Audio Devices.
Step 3 – Configure Master Output
Open Applications > Utilities > Audio MIDI Setup – if the Audio Devices window is not visible, click Window > Show Audio Devices.
Right-click on the BlackHole 16ch item and select Use This Device For Sound Output:
You’ll see a little speaker icon appear beside the BlackHole 2ch device.
Quit Audio MIDI Setup.
Step 4 – Configure rekordbox Audio
Connect your DDJ-1000 and power it on. If you see NO AUDIO DRIVER appear on the jog displays, launch the DDJ-1000 Driver Version Display Utility then quit it; you’ll now see Pioneer DJ and rekordbox in the displays.
Launch rekordbox, open Preferences > Audio and verify that the DDJ-1000 is set as the Audio device. Tick the box below it to enable the PC MASTER OUT function, and the Master Output should now show DDJ-1000 + Blackhole 2ch: