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iStumbler is the leading wireless discovery tool for OS X, providing tools for finding AirPort networks, Bluetooth devices, Bonjour services, and your GPS Location with your Mac.

iStumbler is $20 for all the computers that you own. Download iStumbler and try it out for free, then purchase a license within the app via PayPal or Coinbase. Previous donors and subscribers are entitled to a free license--see the store page for details.

What's New

Version 100 (100.104):
  • Integrates "Let's Move" to put iStumbler in Utilities on first run
  • Fixes font-size bug from 100, you can now scale all fonts from 9 - 24pt throughout
  • Adds new 'Hairline' and 'Boldline' drawing options for the charts
  • Tweak the location format so the degrees, minutes and seconds symbols are back at the top-line
  • Fixes bug that prevents more...

Requirements

  • OS X 10.8 or later
  • AirPort, AirPort Extreme, or Bluetooth
  • Notification support requires the Growl Framework 0.7.3 or later

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iStumbler User Discussion

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Most Helpful Reviews...

MacUpdate most helpful reviews user icon
from Eric-Woehler

No longer free - dev's web page states clearly it is now $20 for all the computers you own.

Seriously? $20?

I would have considered paying $2 for this useful utility, but $20 is way too much. It's a good app but more...

4 people found this review helpful
Version 100
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Eric-Woehler Member IconReview+417
Eric-Woehler
+4

No longer free - dev's web page states clearly it is now $20 for all the computers you own.

Seriously? $20?

I would have considered paying $2 for this useful utility, but $20 is way too much. It's a good app but plenty of good alternatives out there - check out wifi explorer (my reccommendation); other apps besides these. Radar

Reply4 replies
Version 100
Lacwbo
+1

Still shows free on this Macupdate site. I wonder what ever happened to Version 100.86, advertised on this site Friday, June 27 and referred to in an email to me from Macupdate?

Istumbler (Developer)
+2

Yup, seriously, $20.

I've been working on this app, for free, for more than 12 years. There are some other things I'd like to do and the revenue from iStumbler will help make this possible.

If all you want is a Wi-Fi scan list, I suggest you look at the Wi-Fi Diagnostic tool build into OS X, it's free, you already have it and you don't have to waste any more time on the internet slagging independent developers for trying to make a living on their work.

Neutralzone
+3

WiFi Explorer is a better app for understanding nearby access points, but iStumbler does a lot more than that. iStumbler can also list Bonjour services on your LAN and Bluetooth clients in range, which I find useful for troubleshooting; WiFi Explorer doesn't do that at all. If a developer wants to be paid for their work that is their right.

Rickzeman
+3

Well, it's his right to charge $20 for it...and your right to not buy it.

Libertyforall1776 Member IconComment+1130
Libertyforall1776
+3

iStumbler Release 100 GM Candidate 4 is out! http://istumbler.net/beta/istumbler-100gmc4a.zip

http://istumbler.net/beta/index.html

Reply1 reply
Version 99
bbbc
+0

Lion 10.7.5 = iStumbler Release 100 GM Candidate 4 = istumbler-100gmc4a.zip

This is the only utility of this nature that works with Lion. The others (KisMAC) are broken, work with 10.8+, or are commercial.

Roy-Earle Member IconComment+2
Roy-Earle
+2

Fun and useful, but when I tried to uninstall it, it left shards in the Security and Privacy control panel under Locations that I can't figure out how to get rid of. Therefore it gets a low rating from me.

10.8.2 iMac

Reply1 reply
Version 99
Istumbler (Developer)
+0

Roy-Earle, that's a problem for any app, and Apple's bug here's the fix:

killall locationd ; rm /var/db/locationd/clients.plist

Strych9 Member IconReview+56
Strych9
+0

Really great App. Neat and clean.

A Lion version is available on the developer site, soon a Moutain Lion I hope :-)
http://istumbler.net/beta/index.html

Thanks a lot !!

Reply0 replies
Version 99
B. Jefferson Le Blanc Member IconComment+649
B. Jefferson Le Blanc
+1

OS X Lion has a built-in utility for testing WiFi networks, Wi-Fi Diagnostics Utility, which can be found in the /System/Library/CoreServices/ folder (as explained in a MacFixIt article: http://reviews.cnet.com/8301-13727_7-57346631-263/diagnosing-and-addressing-wi-fi-signal-quality-problems/).

Reply1 reply
Version 99
Alice Auld
+0

Hi,
DO you know if this sniffer shows up non-broadcast wifi networks ?

thanks,
Alice

Surfpunk Member IconReview+41
Surfpunk
+3

I love this app, however on Lion it crashes shortly after start.

Hunting around, there are betas available here...
http://istumbler.net/beta/

the author is still developing this, yay!

Running the latest beta and enabling bluetooth seems to cure the crashes. I look forward to a final version where active bluetooth isn't required but for now I'm happy enough!

Reply0 replies
Version 99
Bdikkat Member IconComment+211
Bdikkat
+1

The "leading wireless discovery tool for Mac OS " doesn't work on 10.7.1

Reply2 replies
Version 99
chiggster
+1

I can confirm this as well. Just crashes out after running for about 10 seconds. Bummer.

newacct
+1

Try using the latest beta (see Surfpunk's review) and enabling Bluetooth on your computer

Tookay Member IconComment+6
Tookay
+1

After upgrading to 10.7.1, iStumbler crashes regularly on my MacBook Air, but it doesn't crash on my iMac. No crashes on either machine under the initial 10.7 Lion. Update notes for 10.7.1 does say something about improvements to WiFi, so I'm wondering if the associated changes may be affecting iStumbler?

Reply1 reply
Version 99
newacct
+1

Try using the latest beta (see Surfpunk's review) and enabling Bluetooth on your computer

Satcomer Member IconComment+64
Satcomer
+0

It now crashed in Lion! Will it ever get updated to work in Lion with crashing.

Reply0 replies
Version 99
Franck Melka Member IconReview+1
Franck Melka
+1

A real great software, Swiss Knife is exactly true.

Message from France.

Reply0 replies
Version 99
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> 4 27

Ratings

Overall
(27)
Current Version (100.x)
(0)

Details

Downloads 155,606
Version Downloads 401
License Demo
Date 21 Jul 2014
Platform Intel 64 / OS X
Price $20.00
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