Apple Wifi signal tools

From   OsxDaily

Wi-Fi Diagnostics is an incredibly useful utility to troubleshoot and optimize any wireless network and the signal strength of computers that are connecting to it. This utility first came bundled in Mac OS X Lion and works with all wireless routers and not only the Apple branded ones, meaning you can improve the performance of just about any wifi network by using it and making some adjustments along the way. It’s easy to use and we’ll walk you through the process of getting the best wireless signal using the app, but first we have to uncover the tool itself.

The Wi-Fi Diagnostics app is buried within Mac OS X 10.7 & OS X 10.8, here’s how to access it:

• From the OS X desktop, hit Command+Shift+G and enter the following path:
/System/Library/CoreServices/
• Sort alphabetically and find “Wi-Fi Diagnostics”, if you plan to use the app even somewhat frequently it’s recommended to drag Wi-Fi Diagnostics into Launchpad for easy access

With Wi-Fi Diagnostics now in the easier to access Launchpad… open Wi-Fi Diagnostics.app, then:

• For OS X Lion users, check the radiobox next to “Monitor wireless performance” then click on the “Continue” button
• For OS X Mountain Lion (and later) users, pull down the “View” menu and choose “Performance”, or just hit Command+5

Why Apple changed the process between OS X 10.7 and 10.8 is a mystery, but the feature remains in the newest versions of Mac OS X regardless.