NetMute
NetMute
What Apple's Firewall Really Does
The built-in macOS firewall (System Settings → Network → Firewall) decides which apps and services may accept incoming connections, and its stealth mode keeps your Mac from answering probes. That is how Apple documents it: for incoming connections. It has no setting for what your apps send out: telemetry, trackers, uploads. That outgoing side is exactly what NetMute covers.
The Missing Half of Network Security
Keep the macOS firewall on for incoming protection. NetMute adds the outgoing half:
- Per-app control. Block an app from the internet, or only single destinations inside it. Every rule shows how often it fired.
- Trackers blocked without prompts. Tracker Shield blocks 300+ curated tracker domains in apps and in browsers. Brave and other browsers that resolve names on their own need one extra setting, and the app's "Where NetMute protects" check shows where blocking works.
- A privacy grade per app. App X-Ray grades each app from what it actually contacts.
A real example from the developer's own Mac, 7 to 22 September 2026: GeForce NOW contacted 59 domains, 2 of them tracking endpoints (feedbacks.telemetry.data.nvidia.com, events.telemetry.data.nvidia.com), both blocked. That is outgoing traffic, which the macOS firewall is not built to handle. The two complement each other; they do not compete.
Built-in Free vs. Pro Add-on
The macOS firewall is part of macOS and costs nothing extra. NetMute is free to download with no time limit: the per-app firewall, live traffic per app, Tracker Shield for the 50 most active tracker domains and 5 custom domain blocks. Pro is a one-time purchase with no subscription and no account: the full Tracker Shield (300+ domains), App X-Ray, the Privacy Dashboard, reports over months, per-app data limits, profiles and schedules. Use both: the macOS firewall for incoming, NetMute for outgoing.
