This is the Mac OS X 10.2 driver for Realtek RTL8139/810x Family PCI Fast Ethernet NIC. This driver is only for Mac OS X 10.2 . Please follow the following instructions to install the driver: 1. Use a command as below to uncompress driver install package by terminal Usage: tar zxvf rtl8139_release111_macos10_2.pkg.tar.gz 2. Then you will see the file display directory named rtl8139_release111_macos10_2, double click it to install driver. *Don't use any utility to uncompress the driver in the MAC OS X 10.2, because that will cause driver install failed!!