Thanks for purchasing your Mac compatible Wireless G PCI Card

Use only the Headgap supplied CD. Disregard the CD that came with the card if you received one.  It is an installer for PC's. 

Open your computer and locate an open PCI slot.  Remove the screw holding down the cover. The card will snap down in the slot squarely.  Replace the screw.

Install the external antenna.

Install the driver for your OS version. It is always a good idea to run the Apple Disk Utility and repair permissions before and after installing software.

Once you reboot your computer, select System Preference/Network.  It will automatically recognize the new device and walk you through configuring it for your network.

Operator Headgap Systems, Inc.
http://headgapstore.com