What it does
Radio Silence is a macOS network monitor and firewall for viewing connections and blocking applications, including background helpers.
Radio Silence suits a Mac user who knows which app should stop connecting and wants a direct block rather than a detailed rule language. Its live monitor exposes helpers and background processes, then offers one-click blocking. Child processes of a blocked app are blocked too, while local inter-process communication remains allowed. Identify the relevant parent app before applying the rule because a helper may support its sign-in or update workflow. The listed requirement is macOS 10.15 or later on Intel or Apple Silicon, and the download is a trial.
Strengths
- Application blocking with background-process visibility
Best for
- Mac users who want straightforward app-level network blocking
Sources
- Radio Silence | Network monitor and firewall for Mac (Oct 26, 2026)