Little Snitch is a host-based application firewall for macOS that shows you exactly which applications are talking to which servers, and lets you decide per application whether to allow or deny each connection. Unlike a conventional packet filter that works on ports and addresses, it works at the application level, so a rule applies to the specific program rather than to every program that happens to use the same port. The Network Monitor gives a live, searchable list of connections with the remote host and the reason each one appeared, and Quick Blocking lets you refuse a connection on the spot with one click. A block list and statistics view help you spot chatty software. The paid product is Little Snitch from Obdev, sold as a yearly subscription; the company also offers a companion firewall for iOS.
Little Snitch
Latest version:Unknown
Release date:Unknown
Little Snitch is a host-based macOS application firewall. Unlike a conventional packet filter that works on ports and addresses, it operates at the application level, so a rule applies to one program rather than everything sharing a port. A live searchable Network Monitor shows each connection's remote host, Quick Blocking refuses a connection on the spot, and block lists flag chatty software.