The US221A is a 2-port USB 2.0 Peripheral Switch that allows up to 2 computers to share the use of a single USB peripheral device (such as a printer, scanner, mass storage drive, etc.) on a one-at-a-time basis. The peripheral focus can be given to a computer manually by using pushbuttons on the switch, using the software-based configuration utility, or by the Auto Switch function. Compatible with both Windows and Mac, and with multifunction printer support, the US221A is the ideal way to share the latest USB 2.0 peripherals in a multimedia office environment.
Answer: Thank you for your inquiry,
The Aten US221A is compatible with Windows and Mac.
Please let us know if you would like us to check compatibility with a more specific OS.