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Life & fun · August 15, 2011

MU

My user-friendly outbound firewall for Mac

Radio Silence is a user-friendly firewall that blocks internet access from individual apps on your Mac

My user-friendly outbound firewall for Mac launched on August 15, 2011 with 77 votes, #17 of 248 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 15 years on.

Visit radiosilenceapp.com ↗Alternativestop 7% of August 2011

In plain words

Radio Silence is a Mac firewall that blocks internet access from individual apps. Designed for non-technical users, it runs invisibly in the background without requiring open windows. The built-in network monitor displays real-time connections, allowing users to identify and block misbehaving apps with a single click. The software works across all Mac models and comes with a 30-day money-back guarantee.

written from the facts on this page · September 2026

From the sources

Radio Silence works with all kinds of Macs, and you don't have to be a network expert. The firewall is invisible and always active. You don't have to keep any windows open. Safe 30-day guarantee: If you’re not 100% happy, you get your money back. No questions asked. “Quintessential Mac” is a perfect description of Radio Silence. Radio Silence's network monitor shows you every network connection in real time. If you find a misbehaving app, you can block it with a single click. Safe 30-day guarantee: If you’re not 100% happy, you get your money back. No questions asked. A lot of apps secretly check in with the mothership behind the scenes without asking your permission. If you'd…from radiosilenceapp.com

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