macOS Firewall vs NetMute — What Apple’s firewall cannot do

What NetMute does

Per-app firewall — allow or block any app's internet access

Tracker Shield — detection of 1100+ known trackers

Privacy score per app, based on what each app contacts

Real-time traffic and domain-level monitoring

Per-app data limits and metered-network profiles

Network profiles that switch rules automatically

Fail-open by design: if NetMute stops, your connection stays online

One-time In-App Purchase — no subscription, no account

What Apple's Firewall Really Does

The built-in macOS firewall (System Settings → Network → Firewall) filters incoming connections to protect your Mac from external attacks. It does not control what your apps send outward — telemetry, trackers, data transfers. 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: it monitors each app's network activity, identifies tracker connections, assigns a privacy score, and lets you block any app from accessing the internet. The two are complementary, not competitors.

Built-in Free vs. Premium Add-on

The built-in macOS firewall is part of macOS. NetMute is free to download from the Mac App Store; Premium features (Privacy Dashboard, App X-Ray, full tracker database) unlock via a one-time in-app purchase — no subscription. Use both: macOS firewall for incoming, NetMute for outgoing.