The A4-PK-920H supports a Mac OS X 10.9 Mavericks Mac operating system which is newer than most medium megapixel count webcams that are a similar age to it. Most webcams of a comparable age and type to it support a Mac OS X 10.7 Lion Mac operating system. In addition, this Gembird webcam support Mac OS X 10.5 Leopard and Mac OS X 10.6 Snow Leopard and Mac OS X 10.8 Mountain Lion Mac operating systems.
A Mac OS X 10.9 Mavericks Mac operating system is in fact the best supported Mac operating systems support across all webcams of this age and spec.
A Mac OS X 10.4 Tiger Mac operating system is the worst supported Mac operating systems support amongst comparable types of webcam.