Fix a network problem on your Mac

Start from what you see, not from the tool. Each guide walks from the quickest check to evidence you can show your provider.

• A Website Won't OpenFind out whether a site is down, unreachable from your network, or just not resolving.
• Is My VPN Working?Check that a VPN hides your address, and get warned when it drops or leaks.
• Measure the Speed Between Two of My MachinesUse iperf3 to measure your Wi-Fi and wired links between this Mac and another computer or a NAS.
• The Internet Is Slow or Keeps DroppingFind out whether it's your Wi-Fi, your router or your provider, and collect evidence you can show them.
• Video Calls Lag or FreezeFind out whether a busy line is behind choppy calls and games, and how to fix it.
• Watch a Server and Get Alerted When It Goes DownSet up Uptime Monitor to check a website or server on a schedule and notify you when it fails.
• Who Is on My Network?List every device on your network, find out what each one is, and get notified when a new one joins.
• Wi-Fi Is Weak in Some RoomsMeasure where the signal drops off, see how crowded your channel is, and pick a better one.