1. Wireless Mac Address

Apple iMac and Macbook's built-in wireless card is known to have limited coverage as it does not feature an external antenna for better signal reception, however we can easily boost the Wi-Fi signal strength and range of any Apple Mac computer using external USB wireless dongles with external antenna. To get this working make sure you have an WiFi USB Adapter which is compatible with Apple Mac OS X and have drivers available for it, luckily for me the Realtek 8191 Chipset based Mini 300Mbps USB Wireless Adapter we used earlier to did the trick. Once you have your wireless usb adapter connected to the Mac we need to identify it and install the correct driver for it, We will be using the Mac OS X ' System Information' utility (find via spotlight search) to get our hardware information as shown below.

1. Configure router according to instructions from router or the guy above is accurate as well. When your done restore your previous version of updated operating system. To avoid the downgrade, I just used a older computer to set up Linksys router, established my wireless network than provided credentials to newer computer.
2. Edit Article How to Configure Your Apple Airport Router. In this Article: Setting Up a Basic Wireless Network Changing Network Configurations Setting Up a Wireless Printer Community Q&A Trying to setup your AirPort Express or Extreme wireless router? Apple makes the process easy with the AirPort Utility program.

Wireless Mac Address

Click the Apple menu icon in the top left corner of the screen and select System Preferences. In the Internet & Network section of the System Preferences window, click on the Network icon. In the Network window, double-click AirPort. The 12-character alphanumeric combination listed as AirPort ID is the MAC Address.