Radio Silence on a Mac
Lightweight macOS outbound firewall (app) · Security Tools
Radio Silence is a lightweight macOS outbound firewall — a simple Network Monitor plus a firewall list to block specific apps from phoning home, with very low overhead and no per-connection popups. Install the cask; manage rules in its app UI.
Run Radio Silence with FrontierStack
FrontierStack lists Radio Silence in its Security Tools catalog. Install or connect it from one place, then monitor its status, ports and certificate, secure it with the firewall and Malware Audit, and back it up.
Run it all from one Mac app.
FrontierStack installs, monitors and secures the whole stack — locally and across your fleet — from a single native macOS app.
Download FrontierStack