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In OS X Lion, I often used Wi-Fi diagnostics tool (screen, link) to report proper wifi signal level, since the wifi icon next to the clock in OS X menubar isn't reliable at all. (It shows full signal level even I'm too far from my router for internet connection to work...)

I can't find it in Mountain Lion. Is this functionality removed?

EDIT: Yes, the app is still there. The main screen looks slightly different though.

Lion: Lion

Mountain Lion: ML

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2 Answers

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The functionality is not removed in Mountain Lion. It's still in the same spot as Lion.

/System/Library/CoreServices/

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Please clarify your answer; I don't see how this is an answer, you're just repeating the OP's observations, including a link to the same web page. – Daniel Beck♦ Aug 12 '12 at 22:00
skub, the app is different on Mountain Lion, are you able to show wifi signal levels? I couldn't find it. I've just connected OS X Lion backup and copied the app from there – it seems to work fine. – babca Aug 12 '12 at 22:26
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Yeah, they changed it around a bit. Do a command (Apple button) and hit number 5 or 6 and it will bring up the wifi scan that shows levels and the performance tab. Check under the View menu to see all the options. – skub Aug 12 '12 at 22:39
up vote 1 down vote

Easiest for mountain lion is to hold ALT and click on WiFi icon in menubar then "Open WiFi diagnostics" and (ignore main screen) then View->Wifi Scan for easy signal strength graph.

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