You can find driver packages on the Pioneer DJ Support Download Page .
If you are using a supported legacy OS (10.5, 10.6, or 10.7), follow these steps: DJM-T1 Driver - MacOS Big Sur 11.0.1 - Pioneer DJ forums Pioneer Ddj T1 Driver Mac Download
Version 1.1.0 (December 2011) is the last primary update specifically for early Mac OS X versions. Compatibility with Modern macOS (Sonoma, Ventura, Monterey) You can find driver packages on the Pioneer
If you are running a modern Mac (macOS 10.15 Catalina or newer), you may not need a traditional driver for MIDI functions, but the audio interface presents challenges: but the audio interface presents challenges: