I recently purchased a USB WiFi antenna, once I finally got the drivers installed on my MAC, I was annoyed to find that the network I was trying to connect to was missing from the list of discovered networks. I new this wasn’t because the network was hidden, as I could discover it fine with the laptops internal adapter…

Some research uncovered that my problem most likely lay in the fact there where two spectrum bands.

I couldn’t find an easy way to find out what channel the router was broadcasting on. I eventually found the following methods:

Method 1: using the option key

  1. First, hold down the Option key.
  2. Next, Click on Wireless icon (Airport icon) and you will see information as follows:

Method 2: using system information

Click on Spotlight and type “system information“. OR press cmd+space-bar and then type “system information“. Finally, choose Network and select Wi-Fi. The WI-FI connection information will be displayed on the right.

Method 4: Command line utility

List details of the current network:
/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I

List available wifi networks from the Mac OSX terminal command line:

/System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport scan

Method 5: KisMAC

Connection speed:

Open “network utility” and select the Info tab and choose Wi-fi (en0 or en1) on the drop-down options.