When a user installs Radio Silence on their computer, the software creates a filter that sits between the user's computer and the internet. This filter examines all incoming and outgoing traffic and blocks any suspicious activity. The software also allows users to create custom rules and filters, giving them fine-grained control over which applications can access the internet.
If you forgot to deactivate the old Mac (e.g., it was stolen or crashed), contact support. They can manually reset activations. Radio Silence License Key