Mac Tool For Measuring Wifi Strength

Wi-Fi is essential to most Mac users, but what happens when your network gets sketchy? Apple's hidden Wi-Fi Diagnostics tool should help you improve Wi-Fi performance.

This Wi-Fi network discovery tool displays every wireless hotspot’s MAC address, encryption, signal strength and channel, and is the standard troubleshooting tool for millions of Wi-Fi users. The native and already powerful Wi-Fi Diagnostics Tool in Mac OS X got a redesign in modern versions of Mac OS X, and with it came some new features that make the utility better than ever. One of the best new additions is the built-in Wi-Fi scanner tool, which is a full-featured wifi stumbler to. Vulcan YTL19107 Tool Box Set With Strut, 24, 17, 16-1/2 in W x 27-1/2, 22, 11.9 in D x 48, 36, 30 in H Available for in-store pickup only: add to cart and select 'In-store Pickup' for the MAC'S store of your choice for free ship to store.

[ABOVE: Apple's Wi-Fi Diagnostics tool should look like this. I've deleted BSSID and network names for security.]

Products such as Acrylic WiFi Home report on your wireless network's signal strength, but if you want to know about real-world throughput, download the TamoSoft Throughput Test. This includes quick access to information like the MAC address of the hardware, the Wi-Fi mode, operating band and channel. RSSI is best thought of as a measure of signal strength, even if. RSSI: Received signal strength indication, a way of measuring how powerful the signal currently is. Noise: A way of measuring how much other signals are interfering with your Wi-Fi connection TX Rate: The max speed you can expect with your current signal. In Mac OS X Mountain Lion v10.8.4 and later, Apple provides the Wireless Diagnostics tool that's more than just a stumbler: it can help detect and fix Wi-Fi issues as well.

The hidden tool

To access Wi-Fi Diagnostics, Option-click on the Wi-Fi icon in your Menu bar. In the drop-down menu that appears, select 'Open Wireless Diagnostics.' The Wi-Fi Diagnostics app is hidden inside /System/Library/CoreServices/Applications, from where you can drag the app icon to make it easily available in your Dock.

When you launch the app, a screen appears to tell you what the tool does and asks you to let it run tests to determine the state of your current Wi-Fi connection; these can take a few minutes to complete.

While in Wireless Diagnostics, open the Utilities Window via the Menu bar (Command-2). This shows you much information inside: Info, Logging and Performance windows; A Frame Capture mode to sniff network traffic and a Wi-Fi Scan mode that captures useful info about your own and other networks in your area.

Check the channels

The first thing to check is what channel your network is on in comparison with other networks in your area. If you find you are sharing a channel with others nearby, it helps to change the channel on your router to one the other networks aren't using -- a clear channel usually improves reception quality.

Mac Tool For Measure Wifi Strength

You can use the information to determine the strength of your Wi-Fi signal (or use the Performance tab in this window to see how the tool sees your network performance in the Quality section to top left).

Wifi

Assessing signal strength

The Wi-Fi scan pane offers two metrics to help you determine this: Signal (RSSI, Received Signal Strength Indication) and Noise.

The first refers to the strength of the signal between your Mac and your router. Higher numbers are better but because these are rated as minus numbers, it's important to note that an RSSI of -60 is actually much better than an RSSI of -80.

Noise refers to the amount of wireless noise that may be affecting Wi-Fi reception. Neighboring networks, or the usual network interference culprits such as microwaves or some cordless phones, can impact your reception. Like RSSI this is measured in minus numbers, but a lower number is best, so a Noise level of -46 is better than one of -40.

The difference between these numbers is the quality of your network, so if you have an RSSI of -47 and a Noise level of -96 then the difference is 49. This is called the SNR (Signal to Noise Ratio) and the higher this number is the better your Wi-Fi performance will be. An SNR of 25 or above means you should have good performance.

Tips

Mac tool for measure wifi strength strength

The Performance pane shows you the quality of your Wi-Fi over time. Given that some electrical devices (including devices situated in neighboring rooms and homes) and other networks can impact your performance, you might want to keep an eye on this while moving your Mac around. You may eventually find a place in your space in which performance is better than anywhere else, or achieve better performance by switching off other computers or electrical devices.

Other terms that may be useful when using this tool:

Mac Tool For Measuring Wifi Strength Test

Mac tool for measure wifi strength strength
  • BSSID: This is the identifier for your airport hardware.
  • Security: The kind of encryption used -- try to use WPA 2. Do not use WEP, as this is compromised.
  • Transmit Rate: Data speed.

I hope this short report helps demystify and explain a little of what you can do with Wi-Fi Diagnostics.

Mavericks Tips and Tricks

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Mac Tool For Measure Wifi Strength Strength