Run Diagnostics If Wi-Fi Appears to be Connected on Mac but Internet Isn't Working

Appears to be connected to the Mac's Wi-Fi network. However, web pages do not open, emails do not send, or video streaming constantly stops.

on macOS Wireless Diagnostics. This tool can analyze the wireless connection and show detected problems and possible solutions. Apple specifically states that the tool does not change network settings. Apple Support

Requirements

• A Mac with Wi-Fi hardware.
• The wireless network you are trying to connect to.
• Access to the network at the time the problem occurred.
• macOS to view diagnostic results.

Step by step diagnostics

1. Register open applications

Save open documents before diagnostics begins.

Apple recommends that you close any open applications while performing the procedure.

2. Try connecting to Wi-Fi network

Make sure your Mac is connected to the network you're having issues with.

If you are not connected yet, try connecting by selecting the relevant Wi-Fi network.

3. Open Wi-Fi menu

Option (⌥).

While holding this key, click the Wi-Fi icon in the menu bar.

4. Start Wireless Diagnostics

From the drop-down menu Open Wireless Diagnostics.

If the option is not visible, check alternative access paths based on your macOS version and where the Wi-Fi menu is displayed.

5. Start analysis

Follow the on-screen instructions.

The tool analyzes the wireless connection and provides a summary.

6. Check out the results

Click the information buttons next to the issues listed in the Summary section.

So you can learn more about detected issues and suggested solutions.

7. Find diagnostic report if needed

The tool can generate a compressed report that can be shared with the network administrator or technical support.

Apple's stated location /var/tmp folder; filenames WirelessDiagnostics and .tar.gz. Apple Support

Real usage scenario

Your Mac connects to Wi-Fi at home but web pages won't open. Instead of immediately resetting the modem or changing network settings, you can first run Wireless Diagnostics to gather information about the problem.

What to do if it doesn't work?

• Check that Wi-Fi is on and connected to the correct network.
• Test whether the router can access the internet from another device.
• If the diagnostic tool finds no problems, it may be necessary to further examine the network router, DNS settings, or service provider connection.
• If you can't find the report file, Go → Go to Folder via /var/tmp.

Advantages and limitations

Advantages: is a built-in tool for macOS and does not change network settings during analysis.

Limitations: Cannot determine the exact cause of every connection issue. If the issue is caused by the router or service provider, additional investigation may be required.

Privacy: The diagnostic report may contain network information. Instead of sharing the file publicly, share it only with tech support you trust.

Quick conclusion

First, open Wireless Diagnostics with the Option key in the Wi-Fi menu and run the analysis. Review the results before changing network settings.

Verified official source

Apple Support — Using Wireless Diagnostics on Mac

Apple explains the path to opening the diagnostic tool, the analysis steps, and the location where the report is saved.