Operating System: Mac OS (Note: might work with other versions of this os.)
USB 1.1 controller driver
USB 2.0 is not supported, it works as an USB 1.0 controller.
Mac OS 10.0 - driver built-in with OS.
Mac OS 8.6 to 9.x, download driver:
USB 2.0 5-port (4 ext. & 1 int.) adapter supports high-speed (480 Mbps), full-speed (12 Mbps), and low-speed (1.5 Mbps) data transfer modes.