For users on older versions of macOS (such as 10.5 through 10.7), the legacy drivers are still hosted on archive pages:
While MIDI usually works, the internal sound card often fails to appear in "Audio MIDI Setup" on macOS versions like Big Sur or Sonoma. Users frequently report "No Audio" even if the buttons and platters are responsive.
Some community members use third-party tools like the Kext-Droplet-V2 and Pacifist to manually force-install legacy kernel extensions (.kext files) into newer systems, though this requires disabling System Integrity Protection (SIP). Installation Guide for Older Mac OS X
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: