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How to fix Wi-Fi connectivity issues on your Mac

macOS KB-213

Summary

This guide helps you troubleshoot and resolve: How to fix Wi-Fi connectivity issues on your Mac. Follow the steps below to fix the issue.

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Common Causes

Wi-Fi issues on macOS can range from a complete failure to join a network through to intermittent dropouts or sluggish speeds. In most cases, the problem is local to your Mac rather than your internet service, and can be resolved with a few straightforward checks. This guide walks you through the diagnostic steps in order, starting with the quickest fixes and moving towards more detailed troubleshooting.

Quick Fix Steps

Try these steps first. They resolve the majority of Wi-Fi issues without requiring deeper changes.

  1. Click the Wi-Fi icon in the menu bar and toggle Wi-Fi off, wait ten seconds, then toggle it back on.
  2. Confirm your Mac is joined to the correct network and that the signal is strong. Move closer to your router or access point if possible.
  3. Restart your Mac. Choose Apple menu > Restart from the top-left corner of the screen.
  4. Restart your router and modem by powering them off for thirty seconds, then powering them back on. Wait two minutes for the connection to re-establish.
  5. Check whether other devices on the same network are working. If they are, the issue is specific to your Mac.

Detailed Troubleshooting

If the quick fixes did not resolve the issue, work through the following sections in order.

Run the macOS Wireless Diagnostics Tool

macOS includes a built-in diagnostics tool that can identify common Wi-Fi problems automatically.

  1. Hold Option and click the Wi-Fi icon in the menu bar.
  2. Select Open Wireless Diagnostics from the hidden menu.
  3. Click Continue when prompted. The tool will analyse your wireless environment.
  4. Follow the on-screen recommendations, which may include changing your router channel or location.

Forget and Re-join the Network

Corrupt network profiles can prevent a stable connection. Removing and re-adding the network forces macOS to create a fresh profile.

  1. Open System Settings from the Apple menu.
  2. Click Wi-Fi in the sidebar.
  3. Click Details next to the network you are connected to.
  4. Scroll down and click Forget This Network, then confirm.
  5. Reconnect to the network and enter the password when prompted.

Renew the DHCP Lease

If your Mac has an invalid IP address, it may appear connected but have no actual internet access.

  1. Open System Settings and click Wi-Fi.
  2. Click Details next to your active network.
  3. Select the TCP/IP tab.
  4. Click Renew DHCP Lease.

Check for macOS Updates

Apple regularly releases patches that improve wireless driver compatibility and performance.

  1. Open System Settings and click General.
  2. Click Software Update.
  3. If an update is available, click Update Now and allow your Mac to restart.

Reset Network Settings

As a last resort, you can remove all saved networks and reset network preferences to their defaults. This will require you to re-enter passwords for any networks you use.

  1. Open Finder and choose Go > Go to Folder from the menu bar.
  2. Type /Library/Preferences/SystemConfiguration/ and press Return.
  3. Drag the following files to the Trash:
    • com.apple.airport.preferences.plist
    • com.apple.network.identification.plist
    • NetworkInterfaces.plist
    • preferences.plist
  4. Restart your Mac. macOS will recreate these files automatically.
  5. Reconnect to your Wi-Fi network and enter the password.
Important: Resetting network settings will remove all saved Wi-Fi passwords, VPN configurations, and custom DNS settings. Make sure you have these details recorded before proceeding.

Interference from Other Devices

Microwaves, cordless phones, baby monitors, and neighbouring Wi-Fi networks can all interfere with the 2.4 GHz band. If your router supports both 2.4 GHz and 5 GHz, connect your Mac to the 5 GHz network where possible, as it is less prone to interference and offers faster speeds at close range.

Outdated Router Firmware

Routers that have not been updated in some time may have compatibility issues with newer macOS releases. Check your router manufacturer's website for firmware updates, or contact your internet service provider if the router was supplied by them.

VPN or Security Software Conflicts

Third-party VPN clients and firewall applications can interfere with Wi-Fi connectivity. If you have recently installed new security software, try disabling it temporarily to see if the issue resolves.

macOS Location Services

macOS uses location services to improve Wi-Fi performance. If location services are disabled, your Mac may not be able to join networks reliably.

  1. Open System Settings and click Privacy & Security.
  2. Click Location Services.
  3. Ensure the toggle at the top is enabled.
Tip: If your Mac consistently drops connection in only one location, the issue is likely environmental rather than a fault with your device. Consider repositioning your router away from walls, metal objects, and other electronics, or investing in a mesh Wi-Fi system for larger spaces.

Still Having Issues?

Need more help? If the issue persists after trying these steps, please open a support ticket and our team will assist you.

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