Apple-supported network filtering
NetBlocker uses macOS Network Extension technology. macOS shows the approval and keeps you in control of whether the extension is enabled.
Security & trust
Built to block connections, not inspect them.
NetBlocker gives you control over which apps can go online while keeping your rules and network activity on your Mac.
Signed & notarizedEvery public release is checked by Apple.
Local rulesYour blocked-app list stays on your Mac.
No traffic inspectionNo page, message, password, or file contents.
No advertisingNo ad profile and no sale of personal data.
The security model
Small permissions. Clear boundaries.
NetBlocker asks for the access required to filter app connections and nothing unrelated to that job.
Verified distribution
The downloadable app and disk image are signed with an Apple Developer ID, notarized by Apple, and distributed over HTTPS.
Rules stay on-device
The apps you block and the related process list are stored locally. NetBlocker does not upload your blocked-app list to us.
Minimal service data
Licensing and privacy-respecting aggregate analytics use only the limited data explained in the Privacy Policy. Network destinations are not part of it.
Used on your Mac
What the app needs locally
- ✓The identity of an app or process making a connection, so the local rule can be applied.
- ✓Your blocked-app list and whether protection is currently enabled.
- ✓License status and update information required to keep the product working safely.
Not collected by us
What stays private
- ×The contents of websites, messages, files, passwords, or other network traffic.
- ×Your browsing history or a history of the network destinations apps contact.
- ×The names of the apps and processes in your personal blocked list.
Transparent about behaviour, protective of the product
We document NetBlocker's data boundaries, permissions, user controls, compatibility, and release integrity. The source code, internal matching logic, and proprietary detection methods are not published.
Found a security or privacy concern?
Send us the details privately. We will investigate genuine reports and respond through the contact address you provide.