Bridging Wi-Fi & Wired Networks: Windows & macOS Step-by-Step

Windows 10/11 (Internet Connection Sharing – ICS)

1. Press Win+X → Network Connections.
2. Select Wi-Fi adapter → Right-click → Properties → Sharing tab.
3. Check "Allow other network users to connect through this computer's Internet connection".
4. Under "Home networking connection," select your Ethernet adapter.
5. Click OK. Windows assigns 192.168.137.1 to Ethernet; DHCP to wired clients.

Note: This is ICS (NAT), not a true Layer-2 bridge. For bridging (same subnet):

1. Select both Wi-Fi & Ethernet → Right-click → Bridge Connections (admin rights).
2. Creates "Network Bridge" adapter; both ports same subnet.
3. Warning: May cause DHCP conflicts if router also serves DHCP.

macOS (Internet Sharing)

1. Apple Menu → System Settings → General → Sharing (Ventura+) or System Preferences → Sharing (Monterey-).
2. Enable Internet Sharing.
3. Share your connection from: Wi-Fi (or Ethernet).
4. To computers using: Ethernet (or Wi-Fi).
5. Click Start.

Creates NAT + DHCP on shared interface. For true bridge: use Network Preferences → Manage Virtual Interfaces → New Bridge (advanced).

Better Alternatives for Most Users

• Travel router (GL.iNet, TP-Link) – WAN = Wi-Fi client, LAN = Ethernet out.
• Mesh system with Ethernet backhaul.
• Powerline adapters (if wiring allows).