Assuming you’ve downloaded the Little Snitch Disk Image (.dmg file) to your Downloads folder, open a new Terminal window and enter the following command to verify the cryptographic signature of the downloaded file:

Little Snitch for Mac runs inconspicuously in the background and it can also detect network related activity of viruses, trojans and other malware. Features and Highlights Silent Mode – Decide Later There are times where you don’t want to get interrupted by any network related notifications. Apr 01, 2020  Little Snitch now ships with built-in Internet Access Policy information for further macOS system components. Improved selection of relevant information from Internet Access Policy in Network Monitor. Updated Welcome Window in Little Snitch Configuration to reflect the new design of the connection alert.

codesign --verify -R='anchor apple generic and certificate leaf[subject.OU] = MLZF7K7B5R' ~/Downloads/LittleSnitch*.dmg

If the result of this command is empty (no error message is shown), the file is intact and properly signed by Objective Development.

Little Snitch Free

However, if an error message is shown (like “not signed at all” or “failed to satisfy specified code requirement(s)”), this indicates that the file was maliciously modified and is no longer signed by Objective Development. In that case you should NOT open the disk image file.