MacBook WiFi Not Working — Start Here
WiFi problems on a MacBook fall into a predictable set of categories: a corrupted network configuration, a conflicting system file, a router issue mistaken for a Mac issue, a macOS bug, or — least commonly — a hardware fault with the WiFi card.
This guide works through every fix in order of complexity. Start at Fix 1. Most cases are resolved by Fix 4. Hardware faults are covered at the end.
Before You Start: Is It the Mac or the Router?
Before spending time on your MacBook, confirm the problem is not with your router or ISP.
**Quick test:** Take out your phone and connect it to the same WiFi network. If your phone also cannot connect or is experiencing the same symptoms, the problem is the router or ISP, not the Mac.
If your phone connects fine but the MacBook does not, continue with the fixes below.
Fix 1: Turn WiFi Off and Back On
This sounds trivial, but a simple toggle resolves a surprising number of transient WiFi failures — particularly after waking from sleep.
Click the WiFi icon in the menu bar → Turn WiFi Off. Wait 10 seconds. Turn WiFi On. Attempt to connect.
If this does not work within 30 seconds, move to Fix 2.
Fix 2: Forget the Network and Reconnect
Your Mac stores network credentials and configuration data for every network it has connected to. If that stored data is corrupted or stale, the Mac will fail to connect even when everything else is working correctly.
Steps:
1. System Settings → WiFi
2. Click the i (information) button next to your network name
3. Click "Forget This Network" → Forget
4. Click on your network name in the list and enter your password as if connecting for the first time
If you do not know your WiFi password, it is typically on a sticker on your router. For business networks, your IT administrator has it.
Fix 3: Restart Your Router
Even if your phone is connecting fine, restarting the router can resolve issues with how it is handling the Mac's specific connection request.
Unplug your router from the power socket. Wait 30 seconds (not 5 — the router needs time to fully discharge). Plug it back in. Wait 60–90 seconds for it to fully restart before attempting to connect.
Fix 4: Delete Stored WiFi Preference Files
macOS stores WiFi configuration in a set of preference files. When these become corrupted — which can happen after an OS update, after a crash, or gradually over time — WiFi connections become unreliable or fail entirely.
Steps (requires admin password):
1. Open Finder
2. Press Cmd+Shift+G to open "Go to Folder"
3. Type: /Library/Preferences/SystemConfiguration/
4. Look for these files and move them to the Desktop (do not delete yet — you can restore them if needed):
- com.apple.airport.preferences.plist
- com.apple.network.identification.plist
- com.apple.wifi.message-tracer.plist
- NetworkInterfaces.plist
- preferences.plist
5. Restart your Mac
6. Attempt to connect to WiFi
After the restart, macOS will recreate these files from scratch. If WiFi now works, you can delete the files you moved to the Desktop. If it does not, move them back and continue to Fix 5.
Fix 5: Create a New Network Location
macOS Network Locations allow you to save different network configurations. Creating a new location forces a clean set of network settings without permanently deleting anything.
1. System Settings → Network
2. Click the three-dot menu at the top of the left sidebar → Edit Locations
3. Click the + button to add a new location
4. Name it "Home" or "Default" → Done
5. With your new location selected, try connecting to WiFi
Fix 6: Check for IP Address Conflicts
Your router assigns IP addresses to devices on your network. Occasionally, two devices on the same network are assigned the same IP address, causing connectivity failures.
How to check:
1. System Settings → Network → WiFi → Details (next to your connected network)
2. Check the IP Address field. If it shows 169.254.x.x, your Mac has failed to obtain a valid IP address from the router (this is an APIPA address — a fallback address assigned when DHCP fails).
**Fix:** In the same Details screen, click "Renew DHCP Lease." If this does not work, change the Configure IPv4 setting from "Using DHCP" to "Using DHCP with manual address" and enter a number in the IP address field that ends in a high number (e.g., 192.168.1.200) to avoid conflicts.
Fix 7: Update macOS
Some macOS versions have shipped with known WiFi bugs that were fixed in subsequent point releases. If you are running a version that has known WiFi issues, an update may resolve everything.
Apple menu → System Settings → General → Software Update. Install any available updates.
Fix 8: Check WiFi Hardware in System Information
If none of the above fixes have worked, it is worth confirming that macOS can actually see the WiFi hardware.
1. Hold Option and click the Apple menu → System Information
2. In the left sidebar, under Network, click WiFi
3. Look at the WiFi section in the right pane
If you see card details (a card name like "Broadcom BCM43xx" or "Apple Wireless" with a MAC address), the hardware is present and macOS can communicate with it.
If the WiFi section shows "No Information Found" or is blank, macOS cannot detect the WiFi card. This indicates either a hardware fault or a connector that has come loose — proceed to the Hardware section below.
Fix 9: Safe Mode WiFi Test
Booting into Safe Mode loads a minimal version of macOS without third-party extensions. If WiFi works in Safe Mode but not in normal boot, a third-party kernel extension or security tool is interfering with your WiFi stack.
**Intel Mac:** Restart, then hold Shift during startup until you see the login screen with "Safe Boot" in the top right.
**Apple Silicon Mac:** Shut down. Press and hold the power button until you see "Loading startup options." Select your startup disk, hold Shift, and click "Continue in Safe Mode."
In Safe Mode, attempt to connect to WiFi. If it works, the problem is a third-party software conflict. Common culprits include VPN software, security tools, and network monitoring applications.
Hardware Faults: When Software Fixes Do Not Work
If you have worked through every fix above and WiFi still does not work — or if System Information cannot detect the WiFi card — the issue is hardware.
MacBook WiFi hardware faults are typically one of:
**Loose or failed antenna connector:** The WiFi antenna runs through the MacBook display hinge. On older MacBooks (particularly 2015–2019 models), this connector can come loose or fail. Reconnecting it is a straightforward repair.
**Failed WiFi/Bluetooth card:** The WiFi card (which on most MacBooks also handles Bluetooth) can fail. On Intel MacBooks, this is a replaceable part. On Apple Silicon MacBooks, the WiFi chip is on the logic board and requires board-level repair.
**Logic board WiFi circuit fault:** Rare, but possible — particularly on machines that have experienced liquid damage or surge damage.
**What to do:** Bring the machine to us for a assessment. We can determine within 15 minutes whether the fault is software, a loose connector, or a hardware component failure — and give you a clear quote before any work begins.
[Book a free WiFi diagnostic.](https://wa.me/27645295863)
Frequently Asked Questions
Q: My Mac connects to WiFi but drops it repeatedly — is this the same problem?
Intermittent drops are usually caused by a different set of issues: interference from other 2.4GHz devices (microwaves, baby monitors, other routers), a router that is overloaded with connected devices, or a DHCP lease renewal failure. The fix for intermittent drops is typically switching to the 5GHz band on your router and ensuring your router firmware is up to date.
Q: My MacBook connects to WiFi but says "No Internet Connection" — what does that mean?
This means your Mac is connected to your router but the router cannot reach the internet. This is an ISP or router problem, not a Mac problem. Restart the router, and if the problem persists, contact your ISP. Check [our ISP outage monitor](/) for known outages affecting South African providers.
Q: Can I use a USB WiFi adapter as a workaround?
Yes. A USB-C to WiFi adapter (available from Takealot) will work while you arrange a repair. macOS supports most generic USB WiFi adapters without additional drivers.
Q: My Mac connects to my home WiFi but not to office or public networks — why?
This usually indicates a network authentication or proxy configuration issue rather than a hardware fault. Office networks often use enterprise authentication (WPA2-Enterprise or WPA3-Enterprise) that requires specific certificate profiles. Bring the Mac to your IT team, or [contact ZA Support](/contact) for business network support.
WhatsApp us on [064 529 5863](https://wa.me/27645295863) for a same-day assessment at our Hyde Park workshop.