Maybe it's a chatty updater, a telemetry agent, a game that should stay offline, or an app you simply don't trust. macOS has no built-in switch to deny one app the network — the built-in firewall only filters incoming connections. Here's the clean way to block an app's outbound traffic completely.
Block an app in one click
- Install AppLanes and complete the one-time network extension approval.
- Open the Apps list and find the app to cut off.
- Set its lane to Block. From that moment, every new connection the app attempts is denied on-device.
- Watch the Activity view to confirm: blocked attempts show up with a Block verdict, so you can see exactly what the app was trying to reach.
- A transfer that was already in progress may complete — restart the app to sever existing connections too.
Why not the macOS firewall or Terminal tricks?
The firewall in System Settings only controls incoming connections — it will not stop an app from phoning home. PF (packet filter) rules in Terminal can block outbound traffic but operate on ports and addresses, not apps, and they're easy to get wrong. AppLanes blocks at the app level using a macOS Network Extension, survives IP changes, applies to helper processes automatically, and shows you live what's being denied.
Note: every AppLanes feature, blocking included, is unlocked during the 3-day free trial. A few Apple system processes are pinned to safe routes so your Mac keeps working; they're marked with a lock in the Apps list.
Frequently asked questions
Can the macOS built-in firewall block an app from the internet?
No — the built-in macOS firewall filters incoming connections only. To stop an app's outgoing traffic you need a content-filter or proxy-based tool; AppLanes does it per app with one click and shows blocked attempts live.
Does blocking an app stop it from working entirely?
The app keeps running; it just can't reach the network. Apps that require connectivity will show their own offline errors. Unblock it any time by switching the lane back.
Do I need a VPN to block apps with AppLanes?
No. Blocking works with or without a VPN connected — the Block lane simply denies the app's connections on your Mac.
Get per-app VPN routing on your Mac
Every feature unlocked for 3 days, free — no account, works with any VPN, macOS 13+.