For all information about Serato DJ Pro, please visit serato.com.

This section describes the necessary information when you use your CDJ-2000NXS2 with Serato DJ Pro.

CDJ-2000NXS2 has a computer control mode.
That mode enables the CDJ-2000NXS2 to control Serato DJ Pro by connecting your computer with a USB cable.

The internal USB sound card does not work as Serato DJ Pro's audio output device.
You need to use an audio output device that comes with Serato DJ Pro or a mixer that equips an audio output device for Serato DJ Pro.
serato.com

USING THE CDJ AS A SERATO DJ PRO CONTROLLER

You can control Serato DJ Pro from the CDJ-2000NXS2.

How to setup (Dec, 2016)

• Operating Instructions (Windows / Mac OS)
  Connection Guide
  These are instructions regarding the connection and setting of Serato DJ Pro.
• Serato DJ Pro (Windows / Mac OS) : Ver.1.9.5
• Driver software (Windows / Mac OS)
  It isn't necessary to install the driver software.
  By using the standard driver software installed in OS, CDJ works only by connecting a computer with a USB cable.
• CDJ-2000NXS2 Firmware (Windows / Mac OS) : Ver1.55 or later

SERATO DJ PRO SOFTWARE DOWNLOAD

Serato DJ Intro and Serato DJ have been renamed and are now known as Serato DJ Lite and Serato DJ Pro, respectively.
If you currently use Serato DJ, you can continue to use Serato DJ Pro for free.
Update your Serato setup to Serato DJ Pro for free here.
https://serato.com/dj/pro/downloads
Serato DJ Pro Installation guide