Customers who purchased Little Snitch 4 prior to Novemare able to purchase Little Snitch 5 for a reduced price of $25. Existing customers who purchased Little Snitch 4 after Novemcan upgrade to Little Snitch 5 for free. Little Snitch 5 is available now on Objective Development's website for $45 per individual license. The app has also moved to drag-and-drop installation, meaning that restarting is no longer necessary for installation or updates. This interface provides both historical and real-time log data of all network connections. System administrators now have the ability to configure settings via a command line interface, making Little Snitch scriptable for the first time. The new monitoring system is now capable of holding traffic information from up to one year ago, versus one hour previously. The app no longer requires the Network Monitor application to be running in order to collect this information, resulting in reduced memory and CPU consumption. Little Snitch 5 now captures connection information in the background. The app has also been redesigned for macOS Big Sur.

Objective Development says the app's underlying engine was rebuilt to replace the previous kernel extension-based approach, which is no longer supported by macOS. The headline new feature of Little Snitch 5 is integration of new network filter technologies introduced in macOS Big Sur. Whenever an app attempts to connect to a server on the internet, Little Snitch shows a connection alert, allowing you to decide whether to allow or deny the connection. Austrian developer Objective Development today announced the release of Little Snitch 5, a major new version of its popular network monitoring utility on the Mac.

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