MacBook WiFi Not Working? 10 Fixes

1Toggle WiFi Off and On

1. Click the WiFi icon in the menu bar → turn WiFi Off
2. Wait 10 seconds
3. Turn WiFi On — let it scan for networks for 15–20 seconds
4. If no networks appear, also restart your router (unplug 30 sec, replug)

2Forget and Rejoin the Network

1. System Settings → Wi-Fi → Details next to your network
2. Click "Forget This Network"
3. Reconnect fresh — enter the password manually
4. A corrupt saved network config is a common cause of repeated drops

3Change DNS to Google or Cloudflare

Connected but pages won't load? Your ISP's DNS may be failing:

1. System Settings → Wi-Fi → Details → DNS
2. Click + and add: 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare)
3. Remove your ISP's default DNS entries
4. Click OK and test browsing

4Renew DHCP Lease

Connected with no internet, or IP address conflicts on the network:

1. System Settings → Wi-Fi → Details → TCP/IP
2. Click "Renew DHCP Lease"
3. Wait 15 seconds — your Mac gets a fresh IP address from the router

5Reset SMC (Intel Macs) / Restart for Apple Silicon

The SMC controls hardware including WiFi card power. "No Hardware Installed" often clears after reset.

MacBook with Apple Silicon (M1/M2/M3/M4):

1. Shut down completely → wait 30 seconds → restart
2. There is no separate SMC reset — a full shutdown resets equivalent state

Intel MacBook (T2 chip):

1. Shut down → hold Shift + Control + Option + Power for 10 seconds
2. Release all keys simultaneously → press Power to boot

6Reset NVRAM

Intel Macs only:

1. Restart → immediately hold Option + Command + P + R
2. Hold until you hear two startup chimes (or Apple logo flashes twice)
3. Release — Mac boots with reset network configuration

7Delete Saved Network Preferences Files

Corrupted network config files cause persistent WiFi problems:

1. Open Finder → press ⌘ + Shift + G → go to: /Library/Preferences/SystemConfiguration/
2. Move these files to the Desktop (don't delete yet):
   • com.apple.airport.preferences.plist
   • com.apple.network.identification.plist
   • NetworkInterfaces.plist
   • preferences.plist
3. Restart — macOS recreates fresh config files on boot
4. If WiFi works, delete the old files from the Desktop

8Flush DNS Cache (Terminal)

1. Open Terminal (Applications → Utilities → Terminal)
2. Type: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
3. Enter your password when prompted
4. This clears stale DNS entries that prevent pages from loading

9Change Router WiFi Channel

If neighboring WiFi networks are on the same channel, interference causes drops:

• Log into your router admin panel (usually 192.168.1.1 or 192.168.0.1)
• Change the 2.4GHz channel to 1, 6, or 11 (non-overlapping channels)
• For 5GHz: try channel 36, 40, 44, or 48
• If possible, enable 5GHz-only and connect the MacBook to that band

10Reinstall macOS (Last Resort)

If WiFi shows "No Hardware Installed" after SMC reset and nothing else works:

1. Restart into Recovery Mode (⌘ + R for Intel, hold Power button for Apple Silicon)
2. Select Reinstall macOS — this preserves your data
3. A clean macOS install replaces corrupted WiFi kernel extensions