Resident Audio T4 Thunderbolt Interface This interface is in great condition, does not ship with a Thunderbolt cable. PLEASE SEE SYSTEM REQUIREMENTS THEY ARE VERY SPECIFIC FOR THIS INTERFACE System requirements WINDOWS COMPUTERS Thunderbolt equipped system running Windows 8.0 Internet connection or USB port (needed for driver installation) MACINTOSH COMPUTERS Thunderbolt equipped system running OSX 10.9-10.14 only For connection to Thunderbolt 3 ports please use the following adapters Cable Matters Thunderbolt 3 to Thunderbolt or Thunderbolt 2 Adapter Startech Thunderbolt 3 to Thunderbolt 2 Adapter Internet connection or USB port (needed for driver installation) MACOS 10.15 CATALINA COMPATIBILITY INFO Resident Audio Software cannot be installed on this operating system. To continue using your Resident Audio hardware, please do not update to macOS 10.15. Free Shipping No refunds