---
title: "ERR_NETWORK_CHANGED on Mac: find what changes the network · Kilobat Guides"
url: "https://kilobat.app/guides/err-network-changed.html"
description: "Chrome on your Mac shows ERR_NETWORK_CHANGED: a network change was detected. Find the VPN, Wi-Fi or adapter that changes the network and stop it."
---

Error messages

# ERR_NETWORK_CHANGED in Chrome on Mac

Chromium describes this error as: “The network changed.” Chrome stopped the load because the Mac's network changed during it.

Applies to: Google Chrome and other Chromium browsers on all current macOS versions. · Checked: 29 October 2026

## Symptoms

- Chrome shows ERR_NETWORK_CHANGED and says that a network change was detected.
- It happens again and again, or only when a VPN connects.

## Likely causes

- **A VPN that connects or reconnects.** Each time the VPN changes the routes, the network changes for Chrome.
- **Wi-Fi that switches networks.** The Mac moves between two known networks, for example a router and a hotspot.
- **An adapter that comes and goes.** A USB Ethernet adapter, a dock or a tethered phone connects and disconnects.
- **Virtual network interfaces.** Virtual machines and container tools can add and remove network interfaces.

## How to check

1. Note when the error appears. Compare it with VPN, Wi-Fi and dock events.
2. Watch the network state. Run it again when the error appears and compare.

   ```
   scutil --nwi
   ```
3. List the interfaces and their addresses.

   ```
   ifconfig -l
   ```
4. Hold the Option key and click the Wi-Fi icon. Make sure that the network does not change.

## How to fix it

1. If a VPN reconnects often, update it or ask its provider.
2. If the Mac switches between networks, change the order or turn off Auto-Join. See [Mac joins the wrong Wi-Fi network](https://kilobat.app/guides/mac-joins-wrong-wifi.html).
3. Connect the adapter or dock firmly, or try another port.
4. Reload the page. The error stops when the network stays the same.

## With Kilobat

1. Show network changes, drops and roams that the app recorded, with their times.

   ```
   kilobat outages
   ```
2. Show the route and the VPN that traffic uses now.

   ```
   kilobat ip
   ```
3. The CLI is free. Outage history in the app needs Pro.

## Questions

**Is ERR_NETWORK_CHANGED dangerous?**

No. Chrome stops the load to start it again on the new network.

## Sources

- [Chromium source: net/base/net_error_list.h](https://source.chromium.org/chromium/chromium/src/+/main:net/base/net_error_list.h)
- [Chromium source: components/error_page_strings.grdp](https://source.chromium.org/chromium/chromium/src/+/main:components/error_page_strings.grdp)
- scutil(8) and ifconfig(8), man page installed with macOS 27.2

Sources checked on 29 October 2026. Man pages are the ones installed with macOS; open one with `man <name>` in Terminal.

## Related guides

- [“The network connection was lost.” on Mac](https://kilobat.app/guides/network-connection-was-lost.html): This is the macOS text for error -1005.
- [Mac joins the wrong Wi-Fi network](https://kilobat.app/guides/mac-joins-wrong-wifi.html): The Mac joins known networks on its own.
- [VPN connected but no internet on a Mac](https://kilobat.app/guides/vpn-connected-no-internet.html): A VPN sends traffic through a tunnel.
- [Tailscale and another VPN conflict on a Mac](https://kilobat.app/guides/tailscale-vpn-routing-conflicts.html): Tailscale gives each device an address in 100.64.0.0/10.
- [Mac uses the wrong network connection](https://kilobat.app/guides/network-service-order.html): When more than one connection is active, the Mac tries the service at the top of the list first.