Since the official software does not work on modern macOS (10.15+), users typically use these alternatives:
Drivers for the Virus TI are notorious for corrupting if old files remain. Before running the installer:
Since Access Music has discontinued production of the TI series as of 2024, users on modern Apple Silicon (M1/M2/M3) or recent macOS versions must look to third-party solutions: Downloads | The Virus TI - Totally Integrated Synthesizers