The Pioneer DDJ-SB2 does not require separate audio drivers for Mac because it is a USB Class Compliant device. This means your macOS should recognize the hardware as both a MIDI controller and an audio interface automatically upon connection.
is a "class-compliant" device for macOS, meaning it does not require a separate driver to function. Unlike Windows, which requires a specific ASIO driver installation, Mac users can simply plug the controller in via USB for it to be recognized by the operating system. Compatibility and Licensing ddj-sb2 rekordbox driver mac
The driver 2.3.0 runs under Rosetta 2. Rekordbox must also run under Rosetta. The Pioneer DDJ-SB2 does not require separate audio
Rekordbox Settings