Objective Development has released Little Snitch 5.0, a major upgrade that brings a design overhaul, improved traffic statistics, a new command-line interface, and compatibility with macOS 11 Big Sur to the network traffic management utility. Version 5 focuses on integrating new network filter technologies introduced by Apple in Big Sur, with the underlying filter engine being re-built to replace the previous kernel extension-based approach that is no longer supported by macOS. Little Snitch 5 requires Big Sur and runs on both Intel- and Apple silicon-based Macs.
Little Snitch’s new command-line interface enables preferences editing, configuration import and export, debugging, logging, and access to traffic history. The new version also enables you to specify a list of port numbers in rules, prepares the export format for backups in “human-readable” normalized JSON, and records network statistics independently of Network Monitor (so you can quit Network Monitor and still have statistics recorded). Little Snitch 4 licensees can upgrade to version 5 at a reduced price, which you can get by visiting this Objective Development order page. ($45 new, upgrades available, 42.2 MB, release notes, macOS 11+)