How to View Complete Details About a WiFi Network in Mac OS

Whenever you’re connected to a Wireless network (WiFi) on your Mac OS X, you don’t get to see the complete details about that specific WiFi network. You can manage various WiFi settings by visiting Network preferences > WiFi > Advanced. While you can view very few details like your local IP address provided by the router, subnet mask, router’s IP address, setup DNS and proxies; from the Advanced settings window.
But there is a quick way, to view complete details about a WiFi network which includes BSSID, channel & country code of the router, signal strength, disturbance (noise), and the transfer rate of the network.

VIEW COMPLETE DETAILS ABOUT A WIFI NETWORK IN MAC

Make sure you’re connected to the WiFi network whose details you wish to view.
Now hold down option key and click on the WiFi icon on the menu bar. This time you’ll not only see the options to search and switch between the networks, you’ll also see a list of various technical details about the WiFi you’re connected to.
From the top are the interface name and the mac address of the WiFi adapter of your Mac system. The next extra option you get this time is Open Wireless Diagnostics. Without having to visit the advanced setting window you can directly diagnose WiFi problems, using this option.
BSSID is the mac address of the wireless access point (WAP).
RSSI is the strength of the signal of the Wireless network you’re connected to. RSSI stands for Received Signal Strength Indication, whose value ranges from -100 to 0. For a signal to have good strength, its value must be near to 0. That means, RSSI indication of -20dBm is better than -70dBm.
Tx Rate is the maximum speed of the network which is possible for data transfer inside that specific network.
PHY Mode shows which wireless technology standard does the network follow for the connection. Mostly, nowadays’s routers make use of 802.11n technology, but it might vary depending upon the router you’re using.