Little Snitch

Works fine in 10.8

Works fine in 10.7

Little Snitch

Supports iCloud

Secured by Gatekeeper

Supports retina graphics

Little Snitch icon

Available on the Mac App Store
Not available on the Mac App Store

A firewall protects your computer against unwanted guests from the Internet. But who protects your private data from being sent out? Little Snitch does!

0 ratings

On the little snitch website ( they actually have a developer preview just for Mountain Lion.

10.8: Works fine in GM & Retail

Archived comments

No comments.10 comments

Lion (10.7) Comments

[ MikhailT]MikhailTAnonymous 27 Feb 2011 16:12

This makes sense that it doesn't work, it requires a kernel extension to work and in this case, it needs to be recompiled against the new Lion's kernel.

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MatthiasMatthiasAnonymous 29 Mar 2011 18:17

As stated @
"Build 1871" ( works fine.

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[ salome]salomeAnonymous 12 May 2011 23:36

"Diese Version von Little Snitch kann nicht unter Mac OS X 10.7 installiert werden.
Bitte prüfen Sie, ob auf unserer Website eine kompatible Version von Little Snitch verfügbar ist."
This means: This Version of LS is not compatible with Mac OS X 10.7"
Little Snitch doesn't work !!!!

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[ zzz]zzzAnonymous 11 Jun 2011 05:00

Version 2.3.7 nightly (1974), May 26, 2011
Works perfect on 10.7 DP4 MacBook 2,2
The trial version works 100% only that it has to be relaunched every 3 hours.
be sure to check on
apple>about this mac>more info…>system report…>software>Time since boot:

To see how long the computer has been connected before installing software.

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Objective DevelopmentObjective DevelopmentAnonymous 04 Jul 2011 10:39

Please note: Until the official version of Lion is released, there's a special version of Little Snitch that is compatible with the pre-releases of Lion.

You can find this version at:

under "Little Snitch Nightly Build".

So, there _is_ a version of Little Snitch, that works fine with Lion - it's just as "unofficial" as Lion currently is :)

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[ Galaxy]GalaxyAnonymous 13 Jul 2011 15:51

New Version is out 2.4 !! Works 100%

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StefanStefanAnonymous 23 Jul 2011 11:44

Versin 2.4 clearly states that it _is_ compatible with Lion…

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[ Adam]AdamAnonymous 18 Aug 2011 04:17

2.4.2 stopped working for me after the Lion 10.7.1 update.

Double-clicking the app does nothing and it's definitely no longer running in the background…..

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[ Marco]MarcoAnonymous 22 Aug 2011 10:08

2.4.0 does not work well in 10.7.1. Before Lion update worked well but now you can't access App Store or Software Update.

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Jeff CouturierJeff CouturierAnonymous 28 Dec 2011 02:54

This works, but be sure to download the latest version of LittleSnitch and update your install. If you don't, you'll get loads of respawns. Check your system.log (use the Console app) for:

(at.obdev.LittleSnitchUIAgent): Throttling respawn: Will start in 10 seconds

Before Lion I never saw these.
After updating LittleSnitch these never happened again.

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