Little Snitch
Little Snitch
4.5.1

4.1

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Little Snitch4.5.1

10 May 2020

Alerts you about outgoing network connections.

Overview

Little Snitch gives you control over your private outgoing data.

Track background activity
As soon as your computer connects to the Internet, applications often have permission to send any information wherever they need to. Little Snitch takes note of this activity and allows you to decide for yourself what happens with this data.

Control your network
Choose to allow or deny connections, or define a rule how to handle similar, future connection attempts. Little Snitch runs inconspicuously in the background and it can even detect network-related activity of viruses, trojans, and other malware.

What's new in Little Snitch

Version 4.5.1:
Improvements in the Connection Alert
  • Fixed an issue causing the Research Assistant to be shown without any visible content.
  • Fixed an issue causing the “Accept Modifications” button not to work.
  • Improved keyboard control of the connection alert window.
  • Rules for connections that are established via a helper tool (“Some.app via Helper Tool”) are now created for the parent application. This prevents these rules to stop working when the the helper tool changes its path in the course of an update of the parent application. The only exception to this are Terminal programs, for which the previous behavior of creating rules tied to a particular command line tool remains.
Other Bug Fixes
  • Fixed a rare issue where the kernel extension was loaded but couldn’t be initialized.

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How would you rate Little Snitch app?

660 Reviews of Little Snitch

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3
Blamanche
30 March 2020
Version: 4.4.3

Most helpful

I have used this app for a while. Then my computer was stolen. Then I found out that I would have to pay $50+ to install it on my new computer. Sorry but as much as I like the app, it's just not worth that much money. Plus, I must confess that it seems that the level of time investment necessary to make it work the way I would like is continuously increasing. There's no convenient way to tell what some of the callouts mean without much research and T&E. I have other things to do; I'm an engineer for christsake...LOL. If LS actually helped solve that problem and I do believe it can then it would be worth more to me but the current look up info is not very useful because it frequently finds nothing...
(3)
4
Derekcurrie
10 May 2020
Version: 4.5.1
Dated April 22, v4.5.1 may have already been updated on your Mac. - - I have to point out that the recent Little Snitch versions have become more difficult to use from the user's perspective. That dings it one star in my review. However, if we're using Little Snitch in the first place, we've already invited in an amount of user hostility for the sake of having fine grained control over what our computer software is doing out on the InterWebs. Despite the increase in complexity, I've realized that the recent updates/versions provide an even finer grain of control, once you get over the added learning curve. I appreciate that. Now, if only that control was made easier again for the user to access and use via fewer clicks and more obvious options. - - All in all, this is one of my Mac's greatest asset applications.
(1)
Aargl
09 April 2020
Version: 4.5
I give you a nice trick I use (with Little Snitch or other similar app): block http for Mail.app (or other mail client), it will avoid displaying many useless images! (and incidentally save some bandwidth) Usually, the long-standing images of many newsletters are served through http and not https (don't ask me why) , I've just noticed that, and it also applies to many spammers (when they don't use Base64 images). This doesn't apply to serious websites, so it might give you a hint of how a given website is considering privacy... You can also apply more advanced filters on mail clients — I must say that I've always allowed full connections to them and was amazed of the unwanted connections (tracking) they do when I started filtering them. I think we always consider filtering for apps and browsers, not mail clients as they don't have security extensions such as uBlock, uMatrix, etc. What do you think? :-)
(1)
Show comment (1)
1
Macguruguy
01 April 2020
Version: 4.5
Doesn't load system extension properly. Developer is not shown in Security & Privacy Pref Panel under Allow button. Had to disable SIP and re-enable to get extension to load. Until developer fixes this problem, I will continue to give 1 star review.
(0)
3
Blamanche
30 March 2020
Version: 4.4.3
I have used this app for a while. Then my computer was stolen. Then I found out that I would have to pay $50+ to install it on my new computer. Sorry but as much as I like the app, it's just not worth that much money. Plus, I must confess that it seems that the level of time investment necessary to make it work the way I would like is continuously increasing. There's no convenient way to tell what some of the callouts mean without much research and T&E. I have other things to do; I'm an engineer for christsake...LOL. If LS actually helped solve that problem and I do believe it can then it would be worth more to me but the current look up info is not very useful because it frequently finds nothing...
(3)
Show comment (1)
2
Macguruguy
24 March 2020
Version: 4.4.3
Current update to Mac OS 10.15.4 Catalina says that there is a legacy extension that will not work in future versions of Mac OS
(1)
5
rafabass05
18 January 2020
Version: 4.4.3
muy buena esta aplicacion, es la mejor para monitorear todo el trafico de red en las macbook pro...
(0)
5
ocean442
06 November 2019
Version: 4.4.3
The first app I install on any new Mac.
(1)
5
Dhess01
08 October 2019
Version: 4.4.3
Um, yeah. If you installed this after the Catalina upgrade, here is the terminal fix: When you install Little Snitch on macOS Catalina, you may get an error message “Little Snitch version mismatch detected” after restarting your Mac. This is due to a bug in macOS Catalina, sometimes failing to update the boot cache for the newly installed kernel extension. If you are experiencing this problem, please perform the following steps: Restart your system in macOS Recovery. Learn more If you have enabled FileVault to encrypt the contents of your system volume, you first have to mount that volume: Open “Disk Utility”, select your system volume in the sidebar and click the “Mount” button in the toolbar. Please be patient – mounting FileVault volumes may take quite a while. Once the volume is mounted, quit the “Disk Utility” application. Open Terminal from the Utilities menu in the menu bar. Enter the following command: touch "/Volumes//System/Library/Extensions" Note: Replace with the actual name of the volume on which macOS Catalina is installed (usually “Macintosh HD”) Wait about 10 seconds. Then choose “Restart” from the Apple menu in the menu bar to restart your computer. Shutting down can take up to a few minutes because the system is rebuilding the boot cache in the background. Note that during this time no progress indication is shown.
(1)
0.5
Macguruguy
20 July 2019
Version: 4.4.2
No longer installs properly in Mojave. Says extension is blocked by system, but when unlocking prefs to allow installation, developer is not shown as an option. Contacted developer, but they did not provide a resolution to the problem. Has existed in last 2 versions.
(0)
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RogerKatz
16 July 2019
Version: 4.4
The current version is 4.4.2
(2)