How to fix a Mac that won't connect to a Wi-Fi network

Summary

This guide helps you troubleshoot and resolve: How to fix a Mac that won't connect to a Wi-Fi network. Follow the steps below to fix the issue.

Common Causes

Wi-Fi connectivity issues on a Mac can range from a simple toggle error to more complex network configuration problems. This guide walks you through the most effective troubleshooting steps to get your Mac back online, covering everything from basic checks to resetting your network settings.

Quick Fix Steps

Before diving into detailed diagnostics, try these common fixes first. They resolve the majority of Wi-Fi issues on macOS.

1. Click the Wi-Fi icon in the menu bar at the top right of your screen.
2. Select Turn Wi-Fi Off, wait 10 seconds, then select Turn Wi-Fi On.
3. Select your network from the dropdown list and re-enter your password.
4. If the issue persists, click the Apple menu  and select Restart.

Detailed Instructions

Forget and Rejoin the Network

Saved network settings can occasionally become corrupted. Forgetting the network forces your Mac to create a fresh connection profile.

1. Open System Settings from the Apple menu.
2. Click Wi-Fi in the left sidebar.
3. Click Advanced… at the bottom of the window.
4. Under the "Known Networks" list, find your network and click the ••• icon next to it.
5. Select Forget This Network and confirm.
6. Go back to the main Wi-Fi screen, select your network, and enter the password.

Create a New Network Location

macOS uses "locations" to store network configurations. Creating a new location can bypass corrupted settings without affecting your existing setup.

1. Open System Settings and click Network.
2. At the bottom of the left sidebar, click the ••• dropdown menu.
3. Select Locations → Edit Locations…
4. Click the + button to add a new location and name it (e.g., "Home Office").
5. Click Done and attempt to connect to your Wi-Fi network again.

Renew Your DHCP Lease

If your Mac is connected to the router but has no internet access, renewing the DHCP lease can force the router to assign a fresh IP address.

1. Open System Settings → Network.
2. Click Wi-Fi on the left, then click Details… next to your connected network.
3. Go to the TCP/IP tab.
4. Click the Renew DHCP Lease button.
5. Click OK and test your connection.

Troubleshooting

Check for DNS Issues

If your Mac says it is connected to Wi-Fi but webpages won't load, the issue may be your DNS server. You can temporarily change your DNS settings to point to a public provider.

1. Open System Settings → Network → Wi-Fi.
2. Click Details… next to your network name.
3. Select the DNS tab.
4. Click the + button under "DNS Servers" and enter 8.8.8.8 (Google DNS).
5. Click + again and enter 1.1.1.1 (Cloudflare DNS).
6. Click OK and try loading a webpage in Safari.

Run the Wireless Diagnostics Tool

macOS includes a built-in tool that analyses your Wi-Fi connection and identifies common problems.

1. Hold down the Option key and click the Wi-Fi icon in the menu bar.
2. Select Open Wireless Diagnostics…
3. Follow the on-screen prompts. The tool will monitor your connection and provide a report.
4. Review the summary for recommended fixes.

Delete Wi-Fi Preference Files

If configuration files are deeply corrupted, deleting them forces macOS to rebuild them from scratch.

1. Open Finder and press Shift + Command + G to open the "Go to Folder" window.
2. Enter the following path: ~/Library/Preferences/SystemConfiguration/
3. Locate the following files and drag them to your Desktop (as a backup):
   • com.apple.network.eapolclient.configuration.plist
   • com.apple.wifi.message-tracer.plist
   • NetworkInterfaces.plist
   • preferences.plist
4. Restart your Mac. macOS will recreate these files automatically.

Diagnosing Hardware Problems

If none of the software steps resolve the issue, you may be dealing with a hardware fault. Here is how to check:

• Test another network: Try connecting to a mobile hotspot. If it connects, your Mac hardware is fine and the issue is likely with your router or ISP.
• Safe Mode: Restart your Mac. If you are using an Apple Silicon Mac, hold the power button until you see "Loading startup options," select your startup disk, hold Shift, and click Continue in Safe Mode. If you are using an Intel Mac, hold Shift immediately after restarting until the login window appears. If Wi-Fi works in Safe Mode, a third-party app may be interfering with your connection.
• Physical damage: If your Mac has suffered a drop or liquid spill, the Wi-Fi antenna or airport card may be damaged. In this case, please Open a Ticket so our technicians can assess the hardware.

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