How to Find Wi-Fi Link Connection Speed in Mac OS X

If you need to find out just how fast your wi-fi link speed is, or rather, the speed of which your Mac is connected to a particular wireless router, you can find this data through the Network Utility app that is bundled in every version of Mac OS X

This is really the fastest way to determine the link speed of any interface, whether Wi-Fi, ethernet, or otherwise, despite the always handy Network Utility app having been relocated to the depths of a system folder.

If you plan on getting a lot of use out of this, you may want to move Network Utility for easy access and usage, or just get used to launching it through Spotlight, which we’ll show below. There are plenty of reasons this tool is useful to have around and the link speed is good to know, whether it’s troubleshooting sluggish wifi connections, optimizing a network, or figuring out if one channel is better than another for your network to use.

As mentioned already, this will show the connection speed for any network interface on the Mac, including Wi-Fi which is what we’ll focus on here for this example:

1. Join the wireless router you wish to see the link speed for

2. From anywhere in OS X, hit Command+Spacebar to bring up Spotlight and search for “Network Utility”– then hit the Return key to launch the app 

3.Once Network Utility is open, choose the “Info” tab

4. Select the appropriate network interface from the pulldown menu, in this case look for “Wi-Fi” (it may be en0 or en1)

5. Find the active wi-fi connection speed alongside “Link Speed:” it should be listed as megabits per second, for example it may say ’300 Mbit/s’

Elsewhere at the same Network Utility panel you’ll find details of the interfaces vendor and model, which will show you what protocols are supported by the wi-fi card, whether it’s 802.11a, b, g, n, or all of the above. Notably missing is that encryption is not listed within the network details, but you can find encryption type details elsewhere in OS X rather easily from just about anywhere.

It’s important to note this number is the connection link speed, typically signifying the maximum throughput of a particular network interface, and not necessarily the speeds of which you are getting from the internet or network. Accordingly, this is not intended as a method to test the internet connection speed of a computer to the internet in general, and there are more precise ways to do that, like this one using the command line, or by using an app or service like SpeedTest, which is free.

Source:osxdaily.com