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Mac Wi-Fi Keeps Disconnecting? 10 Fixes That Work

Mac dropping Wi-Fi every few minutes, disconnecting after sleep, losing connection after macOS updates, or showing "No Internet Connection" despite being connected? This guide covers every fix for Mac Wi-Fi instability.

⏱️ 5-20 min 💪 Easy–Intermediate 💻 MacBook Air, MacBook Pro, iMac (All Models)

Common Causes of Mac Wi-Fi Dropping

Corrupted Wi-Fi preferences — plist files become corrupt after updates
Router channel congestion — too many devices on the same Wi-Fi channel
macOS Wi-Fi bug after update (very common)
DNS server issues — connected but can't resolve addresses
Sleep/wake reconnect failure — Wi-Fi doesn't reconnect after display sleep
Bluetooth interference — 2.4GHz Wi-Fi and Bluetooth share spectrum
IP address conflict — another device on the same IP
VPN or firewall software dropping connections

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Step-by-Step Fixes

1 Restart Router and Mac

Always start here:

Unplug your router/modem for 30 seconds, then plug back in
Restart your Mac: Apple Menu → Restart
Let the router fully boot (2-3 minutes) before reconnecting
Test if drops continue

2 Delete Wi-Fi Preference Files

Corrupted Wi-Fi plist files are a top cause of persistent drops:

Open Finder → Go → Go to Folder (Cmd+Shift+G)
Go to: /Library/Preferences/SystemConfiguration/
Move these files to the Desktop (backup, don't delete yet):
- com.apple.airport.preferences.plist
- com.apple.network.identification.plist
- NetworkInterfaces.plist
- preferences.plist
Restart your Mac — macOS will recreate these files fresh
Reconnect to your Wi-Fi network and test

This fixes the majority of persistent Mac Wi-Fi issues. The files are auto-recreated; you just need to re-enter Wi-Fi passwords.

3 Switch to 5GHz Band

If your router broadcasts both 2.4GHz and 5GHz:

Connect to the 5GHz network (usually named with "_5G" or "_5GHz")
5GHz is faster, less congested, and less affected by Bluetooth interference
Only downside: shorter range through walls

4 Change DNS Servers

Bad DNS causes "connected but no internet" and intermittent drops:

Go to System Settings → Wi-Fi → Details (click your network name)
Click DNS tab
Click + and add: 8.8.8.8 and 8.8.4.4 (Google DNS)
Or use Cloudflare: 1.1.1.1 and 1.0.0.1
Click OK and test connectivity

5 Renew DHCP Lease

Fixes IP conflicts and stale connection data:

Go to System Settings → Wi-Fi → Details
Click the TCP/IP tab
Click "Renew DHCP Lease"
Click OK and test

6 Disable Wi-Fi Sleep

Stop Wi-Fi from dropping when the display sleeps:

Go to System Settings → Battery
Click Options
Set "Wake for network access" to Always or On Power Adapter
Also check: System Settings → Lock Screen — ensure Wi-Fi isn't being turned off

7 Turn Off Bluetooth Temporarily

Test if Bluetooth is causing 2.4GHz interference:

Click the Bluetooth icon in the menu bar → Turn Bluetooth Off
Test Wi-Fi stability for 30 minutes
If drops stop, the solution is switching to 5GHz Wi-Fi (which doesn't conflict with Bluetooth)

8 Reset Network Settings

Go to System Settings → Wi-Fi
Click the three dots (...) next to your network → Forget This Network
Turn Wi-Fi OFF, wait 10 seconds, turn back ON
Reconnect to your network

9 Create a New Network Location

Resets all network configuration for your location:

Go to System Settings → VPN & Filters → Network (or System Settings → Wi-Fi → Details)
Click the Location dropdown → Edit Locations
Click + to create a new location, name it "Home" or "Office"
Click Done, reconnect to Wi-Fi

10 Update macOS

Wi-Fi driver bugs are frequently patched:

Go to System Settings → General → Software Update
Install any available updates — Wi-Fi fixes are common in point releases

Recommended Accessories

Wi-Fi 6E / Wi-Fi 7 Router

Upgrading to a modern router dramatically improves Mac Wi-Fi stability — especially in congested environments with many devices.

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USB-C to Ethernet Adapter (Wired Backup)

If Wi-Fi keeps dropping during important work, a wired Ethernet connection is the most reliable solution.

View on Amazon

As an Amazon Associate we earn from qualifying purchases.

Still Dropping After All This?

If Wi-Fi drops persist after all software fixes, the Wi-Fi antenna or wireless card may have a hardware issue. This is more common on Macs that have been dropped or had liquid contact. A professional can test and replace the Wi-Fi module.