Networking

Starts with the basics: Wi-Fi turned on, being in range and Wi-Fi appearing in Network settings, plus restarting an AirPort base station.

Helps work out whether cables, devices, settings or your provider cause an internet problem. Covers Wi-Fi recommendations, service status and restarting modems and routers.

Lists checks for a Mac that will not join Wi-Fi: password and security type, hidden network details, access control and signal range.

Shows how to reach Mac and Windows computers and file servers on your network, by browsing or by typing the network address.

Explains how to share Mac files over SMB from Sharing settings and turn it off again. Advises turning off Windows File Sharing for accounts you are not using.

Suggests waiting out a provider outage, checking that Ethernet or Wi-Fi shows as connected and matching network settings to your provider's recommended values.

Explains how to run Wireless Diagnostics when you can reach your router but web pages or streaming fail. It lists detected issues and saves a report file.

Apple's recommended router settings for security, performance and reliability with Apple devices, aimed mainly at network administrators.