Mac Won't Connect to Wi-Fi? Here're 10 Fixes

Peter Aaron
Last updated: May 9, 2023

Summary: Mac suddenly can't connect to Wi-Fi? Wondering why and how to fix it? You have come to the right place. This article covers all your questions. Read on to learn more.

Mac Won't Connect to Wi-Fi? Here're 10 Fixes

Have you ever encountered the problem that your Mac cannot connect to Wi-Fi, especially after a macOS update? Failure to connect to Wi-Fi means that you cannot access the Internet, which brings great inconvenience to your work and life. If you are facing such a problem, then don't miss this blog post. In this article, you will learn why your Mac can’t connect to Wi-Fi and how to solve the problem in 10 ways.

Why Won't My Mac Connect to Wi-Fi?

There's a couple of reasons why your Mac won't connect to Wi-Fi. Here are the most common ones:

  • Your Mac is not in the signal range.
  • The router is defective.
  • Problems with the broadband.
  • Problems with the Wi-Fi network.
  • macOS bugs.

How to Fix Mac Not Connecting to Wi-Fi

Here are some basic methods you can try when your Mac fails to connect to Wi-Fi.

  • Make sure your Mac is within the signal range.
  • Check whether the network cable is properly connected.
  • Turn off and turn on Wi-Fi to restart it.
  • Restart your Mac.
  • Reboot the router.
  • Contact the broadband provider.

If your Mac still can't connect to Wi-Fi, then move to the following advanced methods.

Delete Your Registered Network

This method requires you to delete your network first and then re-enter your network password to connect.

  1. Click the Apple Menu > System Settings > Network.
  2. Click Wi-Fi, then navigate to the Known Networks panel.
  3. Select the network you want to delete, click the 3-dot menu next to it and select Forget This Network.
    Remove Registered Network
  4. Click the Wi-Fi icon in the status menu, find your network name, and then enter your Account Name and Password to reconnect to the network.

Related Article: How to Forget a WiFi Network on Mac (Ventura) – 4 Steps

Unplug External USB Devices

On some older MacBooks, the USB and Wi-Fi modules are close together. When your computer is plugged into a USB or other external device, it may interfere with the Wi-Fi module's signal, causing the Wi-Fi connection to fail. All you need to do is unplug the external devices.

Update DHCP Lease

If you have a fixed IP address, you can try to manually update the DHCP lease to solve the problem of the Wi-Fi connection.

  1. Choose Apple Menu > System Settings > Network.
  2. Click a network service on the right, click Details, then click TCP/IP.
  3. Click Renew DHCP Lease.
How to Renew DHCP Lease

Change DNS Settings

Normally, DNS addresses are obtained automatically. If your current DNS is not working properly, you can try using a free public DNS. Google has a free DNS. You can have a try.

  1. Choose Apple menu > System Settings.
  2. Click Network in the sidebar, then click Network Services on the right.
  3. Click Details and scroll down to find DNS.
  4. Click DNS, then click the plus (+) button and add Google's DNS address: or
    How to Change DNS Settings
  5. Click the OK button and reconnect to the network.

The DNS cache stores as many DNS lookups as possible so that you can perform DNS lookups again. When you need to resolve network problems caused by DNS cache, you can clean the DNS cache. With BuhoCleaner, you can clean up your DNS cache with one click.

  1. Download and install BuhoCleaner on your Mac.
  2. Launch BuhoCleaner, select Toolkit, and click the Start button to flush DNS cache quickly.
Flush DNS Cache with BuhoCleaner

Delete Files from System Configuration

Delete all the files in the System Configuration folder except for

  1. Open Finder from the Dock.
  2. Press Shift + Command + G, and then type /Library/Preferences/SystemConfiguration in the blank box and press the Return button on the keyboard.
  3. Keep the file named and delete all other files in it.
Delete Files from System Configuration

Remove Unnecessary System Extensions

We've found that some system extensions may also prevent your Mac from connecting to Wi-Fi, especially anti-virus extensions. If your System Integrity Protection (SIP) is on, the extensions of antivirus software will remain on your Mac after you uninstall them. To remove these extensions, you should turn off the SIP (which will not affect your Mac) first. Here are the detailed steps:

  1. While booting Mac, press and hold Command + R until the Apple logo appears.
  2. Click the Utility at the top left of your Mac screen and select Terminal.
  3. Execute the command: csrutil status, and you will see Enable. Continue to run the command: csrutil disable.
  4. Restart your Mac, and the SIP will be closed.
  5. Open the Terminal via Spotlight or Launchpad.
  6. Execute the command: csrutil disable again and you will see that the status has changed to disable. Continue to run: systemextensionsctl list, you will see the list of extensions installed on your system, and the Team ID and Bundle ID of each extension.
  7. Continue to run the command: systemextensionsctl uninstall <team id> <bundle id> in Terminal to remove the extension you don't want. You will be asked to enter your administrator password.

e.g. systemextensionsctl uninstall ABCDEFGHIJ com.some.unwanted.extension

  1. To delete more extensions, repeat the step 7.
  2. Restart your Mac and see if your Mac can connect to Wi-Fi.
It is recommended that you complete the above steps and repeat steps 1-4 to enable the SIP. Don't forget to change the command to csrutil enable.

Update macOS

Bugs in macOS can cause Wi-Fi issues. If you've tried several troubleshooting methods without success, you can check for any available software updates in your Settings. If an update is available, follow the instructions to update your Mac. Keep in mind that unexpected errors may occur during the update process, so we strongly recommend that you back up your Mac before proceeding with the update.

Update macOS


Now you have learned several ways to solve the problem that Mac cannot connect to Wi-Fi. Hope you can access Wi-Fi by trying one or more of these methods. If your Mac still cannot connect to Wi-Fi through these methods, there may be a problem with your Mac hardware, and you may need to seek help from a repairer.

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