Little Snitch

Licence: Commercial with demo
Version 3.3.4 | Release Date: 2014-07-23 | Download
No changes specified
Version 3.3 | Release Date: 2013-10-09 | Download

Little Snitch is now compatible with OS X Mavericks.
Added a welcome window to Little Snitch Configuration to help you get started (shown automatically after updating).
Instead of some alerts, notifications are shown in notification center.
The Network Monitor window can now be dragged to a screen that lies above a screen with a menu bar.
Improved filtering behavior during system startup.
Improved Profile Switching Alert behavior.
Improved Network Monitor window positioning on multiple display setups.
Fixed an issue causing Little Snitch to display IP addresses instead of the actual hostnames.
Fixed an issue where a Network Monitor document couldn't be saved from the closing dialog.
Fixed a rare hang in conjunction with certain screen savers.
Copy/paste of rules now preserves process-owner attribute.
Other bugfixes and improvements.

Version 3.0.1 | Release Date: 2012-10-31 | Download

Rules can now be created by dragging applications on Little Snitch Configuration’s dock icon or on Little Snitch’s status menu item.
Installer / Uninstaller now offers a retry button if the installation / uninstallation failed.
Network Monitor Snapshots are now displayed without traffic meters and with server names in gray.
If the “via” executable of a rule does not exist, the rule is now indicated as invalid.
Improved generation of notes text for automatically created rules and suggestions.
Improved notes text for factory rules
Improved installer error reporting if updating boot caches fails.
Changed preferences options beginning with “prevent” into their “allow” counterparts.
Fixed several bugs in detection of redundant rules (e.g. subdomains covered by domain rule).
Fixed a bug where the Network Monitor window could be off screen.
Various other bug fixes and improvements.

Version 2.4.4 | Release Date: 2011-10-10 | Download

iCloud ready.
Adds new factory rules for smooth iCloud operation. You can review these rules by searching for the term "iCloud" in the Little Snitch Configuration application.
Removed a log message.

Version 2.4.3 | Release Date: 2011-10-03 | Download

iCloud ready.

Version 2.3.4 | Release Date: 2011-02-28 | Download

New preference option to enable reverse DNS lookups in Network Monitor.
Improved performance.
Improved Installer application (more robust in non-standard environments).
Improved compatibility with older PowerPC machines running Mac OS X 10.4.11.
Fixes an issue with the “Confirm with Return and Escape” preference option.
Fixes an issue that could cause a kernel panic on machines with 64-bit kernel.

Version 2.3.3 | Release Date: 2010-11-24 | Download
  • Several improvements related to domain rules.
  • Host and IP rules have priority over domain rules.
  • Improved handling of multi level cname redirection.
  • Improved Installer application to better deal with modified system installations.
Version 2.3.2 | Release Date: 2010-10-28 | Download
No changes specified
Version 2.2.4 | Release Date: 2010-07-12 | Download

-Improved support of restoring from a backup system like Time Machine.
-Improved automatic IP address update of hostname based rules.
-The Connection Alert panel adjusts its size to fit long application names.

Version 2.2.3 | Release Date: 2010-05-16 | Download
  • Fixed an issue when creating rules by dragging an application into the Little Snitch rules window.
  • Fixed a localization issue in the preferences window.
  • Fixed: Some applications were not shown with their correct app icon.
  • Improved detection of invalid rules.
  • Some minor UI improvements.
Version 2.2 | Release Date: 2009-09-21 | Download
  • Fixed an issue causing certain rules to be wrongly shown as “invalid”.
  • Network Monitor memory consumption has been reduced.
Version 2.1.4 | Release Date: 2009-06-04 | Download
  • Fixed an issue causing system freezes at login on Mac OS X 10.4 Tiger.
  • Fixed a bug causing repeated connection alerts.
  • Fixed a bug related to rule matching precedence.
  • Minor usability improvements in Little Snitch Configuration.
  • Fixed an issue causing rules with relative process path to show up as “invalid”.
Version 2.1.3 | Release Date: 2009-05-19 | Download

What’s new in Little Snitch 2.1.3

* Improved support for network user accounts.
* Improved “Back up Rules” functionality.
* Fixed an issue causing system freezes at login to network user accounts.
* Fixed a bug causing lots of mDNSResponder connection alerts.
* Fixed a rare crashing issue with the Little Snitch Installer.

Version 2.1.1 | Release Date: 2009-05-11 | Download

Version 2.1.1: Fixed a bug in "Restore Factory Rules" which leads to an empty ruleset.
Version 2.1:

  • Added support for guest accounts.
  • Improved Fast User Switching support.
  • Global rules (computer wide rules valid for all users).
  • Fixed a bug when identifying JavaApplicationStub with 64-bit version of Java.
  • Fixed a bug causing ntpd to show up as “sh” in Network Monitor.
  • Fixed a bug causing a rule with unresolvable DNS name to block any connection.
  • Improved uninstall procedure within Little Snitch Installer.
Version 2.0.5 | Release Date: 2009-01-26 | Download
  • Improved compatibility with various screen savers.
  • Improved Little Snitch Installer.
  • Fixed context menu entry "copy IP address".
  • Fixed memory consumption problem.
Version 2.0.4 | Release Date: 2008-08-13 | Download


  • Improved compatibility with 64-bit PPC machines.
  • Fixed a kernel panic triggered by various Java development suites.
  • Improved Little Snitch Installer.

Network Monitor

  • Support for multiple screens has been improved. The window position and the maximum number of displayed processes is now stored per screen configuration.
Version 2.0.3 | Release Date: 2008-04-04 | Download
  • Several improvements of the Little Snitch Installer. The installer manages to safely upgrade from versions prior 2.0.2.
  • Improved support for OS X 10.5 Leopard File Fault accounts.
  • Improved support for OS X 10.5 Leopard screen savers.
  • Fixed a bug with VoiceOver on OS X 10.5 Leopard.
  • Fixed a bug which could cause a kernel panic.
  • Fixed a bug which could lead to a very large log file.
Version 2.0.2 | Release Date: 2008-01-30 | Download
  • A new toolbar icon allows to quickly lock and unlock the ruleset to prevent rules from being changed by unauthorized users.
  • The configuration program now quits automatically when the last window has been closed. Note that the Network Filter still operates in background, so it’s not necessary to keep the configuration application running. You can restart the configuration application at any time from your Applications folder.
  • Improved scrolling performance in the rules list.
  • Terminated processes are now marked grey (instead of red) and with a "terminated" keyword.
  • Fixed a problem under Leopard regarding the status icon (show window when hovering over icon).
  • Improved performance (fixed CPU usage problem when using BitTorrent clients and alike).
  • Fixed a bug which could cause threads in multi threaded applications to hang.
  • Several minor bug fixes and security enhancements.
Version 2.0.1 | Release Date: 2007-12-06 | Download
  • Fixed a bug which could cause a kernel panic.
  • Fixed a bug where a newly created temporary rule enables a disabled permanent rule.
  • Fixed a bug where a rule with unknown / unresolvable DNS name was erroneously added as an Any Connection rule.
  • After a power failure or hard reset, recent changes to the rule set should now be preserved.
  • Fixed a bug where a "Little Snitch configuration has been modified" warning appeared after every restart.
  • Uninstall works more thoroughly now: also removes log files and registration info.
  • Incoming connections are now reliably attributed to applications on Mac OS X 10.5 Leopard (this is only relevant for Network Monitor).
  • Improved Network Monitor performance concerning BitTorrent and Skype clients.
  • Fix a bug in Network Monitor regarding the activation by hovering over the menu icon.
  • Several minor bug fixes.
Version 2.0 | Release Date: 2007-11-08 | Download
  • Leopard compatibility
  • Brand new configuration interface with full undo support, backup and restore functionality, powerful editing, searching and filtering capabilities, disabling of rules, text notes, and more.
  • New redesigned connection alert with simplified keyboard control.
  • Network Monitor for visualizing network activity in real-time
  • Much improved traffic filtering
  • “via” rules for applications communicating via Unix tools
  • DNS based rules
  • IPv6 support
  • Improved support for full screen applications
  • German Localization
Version 2.0b10 | Release Date: 2007-10-25 | Download

Fixed: Display problems in the Little Snitch Network Monitor when used on Leopard.

Version 2.0b9 | Release Date: 2007-10-21 | Download
No changes specified
Version 2.0b8 | Release Date: 2007-10-08 | Download

Improved Network Monitor

Menu Icon can now be switched off.
New "Action Menu" (gear wheel icon in the Monitor window): Provides menu items previously only available in the Menu Icon's menu.
Transferred bytes (in and out) listed in the Connection History's text representation (produced via the "Copy Connection History" menu item).
Port and protocol names added to Connection History's text representation.
Now using internationalized names for applications.
Other Improvements and Bug Fixes

Fixed a problem with the login window after awake from sleep or screensaver.
Fixed a problem with restore factory rules.
Fixed a bug in the installer where an upgrade could activate disabled rules.
Fixed a bug where connections were refused silently after Fast User Switch.
Fixed a number of issues in Installer.
Factory rule set is now ready for Leopard.

Version 2.0b7 | Release Date: 2007-09-25 | Download

New Features

  • It's now possible to prevent applications from showing up in Network Monitor. Create a new rule for the corresponding application and select “Don’t show in Network Monitor” as the rule's action. If the application already shows up in Network Monitor, you can also select “Don’t Show in Network Monitor” from the application's contextual menu.
  • New preference setting to mark rules that have been created via connection alert as unapproved.

Improved Network Monitor

  • “Recent Connections” renamed to “Connection History”.
  • The entire Connection History can be now copied to the clipboard.
  • New contextual menu for selected application (right-click the application icon).
  • New contextual menu for items in the Connection History.
  • Improved performance, especially in situations with many simultaneous connections (like Torrent downloads or Skype).
  • Reduced memory footprint.

Other Improvements and Bug Fixes

  • Improved compatibility with Front Row and Screen Saver.
  • Improved support for fullscreen applications. Automatically generated deny rules will show up as unapproved disabled rules in Little Snitch Configuration.
  • Fixed an issue causing a kernel panic.
  • Fixed a number of issues in Installer.
  • Improved overall stability.
Version 2.0 beta 6 | Release Date: 2007-08-30 | Download

New in this version:

Brand new configuration interface, with full Undo support, backup and restore functionality, powerful searching and filtering options, and more.
New redesigned connection alert with simplified keyboard control.
Network Monitor for visualizing network activity in real-time
Much improved network filtering capabilities
German Localization
Mac OS X 10.5 Leopard compatibility

Version 1.2.4 | Release Date: 2007-01-25 | Download
  • Improved protection of Little Snitch against manipulation by malicious applications.
  • Fixed a bug that in rare situation could lead to a crash of the kernel module.
Version 1.2.3 | Release Date: 2006-07-10 | Download
No changes specified