Use Serial MIDI Devices Under Mac OS X. Stealth MIDI Serial Driver enables most serial MIDI devices to operate with Apple's Core MIDI software and the Stealth Serial Port under OS X 10.2.3 or later....
USB Audio ASIO Driver. The USB ASIO driver enables buffersizes down to 32 samples (0.73 ms) and does an ultra highspeed USB audio connection, bypassing the operating system's audio....