Native MacOS 10.6 and later, using the system comes with a driver. USB input socket is a standard USB-B type female socket, USB power supply range is 4.5V - 5.1V.. BNC interface and RCA interface output standard S / PDI signal, the level is 550mV. XLR interface output standard AES / EBU signal, the level is 3.3V. The word clock (WCLK) output uses BNC interface, the level is TTL (no load), the output impedance is 75 ohms