WiFi Not Working on Mac After MacOS Big Sur/Catalina/ Mojave Update: MacBook Pro, Air, iMac, Mac Mini

Last Updated on Dec 19, 2020

Related your Wifi connectivity issue on your Mac device here are the top best possible solutions work all time when you can’t turn or enable wifi from your Mac running on Mac Big Sur, macOS Catalina, MacOS Mojave and any other or after updating your OS X. in the case when you turn Wifi and showing black triangle outline of the shape and not turning on, Mostly Wifi issues got a user on OS X version 10.13, 10.14, 10.15 or Other OS version. Are you one of them? Your home and office Wifi not working on Mac but other devices working very well then just try the below steps perfectly.

we are happy to help you, submit this Form, if your solution is not covered in this article.

Mac WiFi Won’t connect to the public Wireless network or Personal Hotspot. There should be network error and Hardware fault in rare cases. Here are a few suggestions to get rid of Wi-Fi issues on Mac.

Fixed Solutions on WiFi not working on Mac OS X: Big Sur, Catalina, Mojave or Earlier

Check Hands-on Video To Fix macOS Catalina WiFi Issues & Earlier Mac OS X

1. Exclamation Mark Point Issues on WiFi Symbol on Top Menu: Renew DHCP Lease

Renew or Get a new DHCP Lease address that refreshes or creates a new connection with a new IPV4 address, Subnet Mask and Router. Follow the below steps to fix if your Mac is Dropping or Unable connect WiFi network.

  1. Go to the Apple Menu on Mac. Next Click on the System Preference option.

    Finder System Preferences option on Mac

    Finder System Preferences option on Mac

  2. Here’s go to Network option, First is WiFi in the left panel or popup windows. After connecting if you are getting an exclamation mark,  Keep Selected WiFi.
  3. Now, Find the Advanced.. option there, Go to TCP/IP section from above multiple tabs.
  4. here’s you will see three IP addresses if no IP address then assigns manually to your Mac. by Click on Renew DHCP Lease.
  5. Now, Try to Connect the Same wifi after disconnected.

WiFi issues are the same after making the changes in IP Address

2. Remove/Delete WiFi Profile on Mac’s Network Settings & Add WiFi Profile

  1. Forget Wi-Fi Network: Click on Apple logo > System Preferences > Network > Wi-Fi option on left sidebar > Advanced > Select the Wi-Fi network and click (-). Restart the Mac, and reconnect the WiFi network.
  2. Reconnect Wi-Fi: Add a New WiFi Profile again, Click on “+” sign and select WiFi from the list of Interface dropdown. and Give a WiFi Name. and click on the Create button.
  3. Now Click on advanced Button.
  4. Select TCP/IP Tab, and click on the Renew DHCP Lease button to get updated IPV4 Address, Subnet Mask, Router address.
  5. Now Move to DNS Tab, and Click on Plus Sign to add new Google IP address,, and again click on plus to add second IP,
  6. Now Move to Hardware Tab, Configure to Manually, And MTU set Custom, and Enter 1453. Now Tap on Apply to save the changes.
  7. Restart Your Mac [Apple logo > Restart or Use the Power button on Mac]
  8. Go with Network Diagnostics [Apple Logo > System Preferences > Network > WiFi > Select Active WiFi Network].
  9. Restart your Router [Turn off the power supply and Turn on-again, Wait for 2 minutes and Try to connect WiFi again].
  10. Test Google.com in Different Browser.

Find our More Cases and Troubleshooting guide that really fix WiFi issues on Mac after Update or install macOS Big Sur, macOS Mojave, or macOS Catalina.

3. Update Date & Time on your Apple Mac

It sounds awkward, though incorrect date and time lead to various issues on the Mac, including the app-specific. Therefore, always set the Date & Time to automatic, after choosing the correct region.

  1. Click on the Apple logo > System Preferences.
  2. Then, go to Date & Time.
  3. Select Time Zone
  4. Checkmark the Set time zone automatically using current location.
  5. Alongside this, enable the Location Services, to ensure the MacBook detects accurate location.
  6. System Preferences > Security & Privacy > Privacy > Location Services (from the sidebar) > Select Enable Location Services.

4. Update Software firmware on Mac

Anyhow you can set up the Ethernet connection on the Mac, then connect Ethernet and update the Mac, if there is any pending software update available.

  1. Click on the Apple logo > About This Mac > Software Update.
  2. Alternatively, open the System Preferences > Software Update.

5. Remove all the Accessories from Mac

Often, we’re habituated to keep connected the accessories like Mouse, Keyboard, External Drive, USB Drive, Headphone, and so on. All these peripherals can affect the functionality of the Mac, so disconnect the ones that you don’t need or for once remove all of them, including mouse, keyboard, etc.

6. Add Custom Location on your Mac

It is kind of advanced settings on which Mac sets its own preference, we don’t need to interfere unless there’s an issue. However, in this case, it seems like you may need to add a custom network location.

  1. Click on the Apple logo on the top menu bar.
  2. Select System Preferences.
  3. Go to Network.
  4. You see, Location? Open it and select Edit Locations…
  5. Click Plus(+) and add a network location, with any name.
  6. Save changes, Done, and Apply.

7. Remove Unnecessary Profile from MacBook

Its possible Wi-Fi not working Big Sur is due to a problematic profile that you have installed from a random website. Remove the profiles form MacBook.

  1. Go to System Preferences.
  2. Click Profiles.
  3. Delete all the custom profiles and reboot the Mac.

8. Delete Network Preferences from MacBook, Mac

Do you remember when iPhone Wi-Fi Stops working, all we do is Reset Network Settings on the iPhone? That’s what you have to do with Mac but in different approaches. Mac doesn’t have any straight option to reset network settings, but deleting the network preference files will do the same.

Backup the Mac, in case something goes wrong, besides, doing this will reset few settings of Mac.

  1. Launch Finder on Mac.
  2. Click Go on the top menu bar of Finder.
  3. Select Computer.
  4. Open the following path: Macintosh HD > Library > Preferences > System Configuration.
  5. Find the listed files and remove them all. Don’t worry, if you don’t find all the files.
    • com.apple.airport.preferences.plist
    • com.apple.network.identification.plist
    • NetworkInterfaces.plist
    • preferences.plist
    • Settings.plist

9. Stop mDNSResponder

Give a try this.

  1. Launch Spotlight (command+space) and open Activity Monitor.
  2. Click on Network
  3. Select the mDNSResponder and click Cross from the top to close the process.

    Restart Network Process on mac

    Restart Network Process on mac

  4. That’s it. New Process will turn on automatically, while you Turn off and Turn on WiFi on Mac.

10. Use USB WiFi Adapter: Fix WiFi Hardware Problem at Low Cost

Repair WiFi Using USB WiFi Adapter

Repair WiFi Using USB WiFi Adapter

External USB WiFi Adapter is ideal solutions nowadays for all Desktop & Laptop system, Also This USB WiFi Adapter is compatible with most of all Windows OS and MacOS. Just buy it in few dollars and Start Browsing anywhere and anytime on any device. here’s what you can use for your Mac if Your Mac’s WiFi trouble with a Hardware problem. Otherwise, Apple WiFi Hardware repairing cost is high compare to this Best USB WiFi adapter.

Also, you can the below troubleshooting, But don’t forget this helpful solution.

11. Other Troubleshooting:-

Case 1: On the new update you might occur problems on PRAM memory and information that should be not updated successfully after update/Restore from old OS X.  Some of the time PRAM memory use an external battery, so it might be not working and out of date battery cant able supply power, in this case, you have to replace it.

Case 2: in case of security purpose, are you using WEP encryption method, that means you can’t use 802.11b, Because Apple’s Airport standard hooked up with Wifi or Ethernet, Verify that Extreme card should be compatible with 802.11g and WPA2.

Case 3: iCloud might be crashed and turn off in this case you have to resolve it.

Case 4: Software update setting might be corrupted, Fixed it be updated, or restore old OS X.

Case 5: Verify that if your devices running through Wifi Router and not be updated with the latest firmware cause giving error and WiFi not working on Mac OS X.

Case 6: Distance Between your router and Mac device should not be closer than 1 meter and not longer than 50 meters.

Case 7: Contact your ISP (internet service provider) and Check it for the valid domain name.

Case 8: in you want wifi on hotspot connection and getting an error on particular browser surfing, Then try on other browsers Chrome, Mozilla, Opera, and Other.

Case 9: Turn off Wake for network option inside the Energy Saver setting, Apple Menu > System Preference > Energy Saver. Easy solution for WiFi not working on Mac Mojave, OS X 10.9.3, OS X 10.9.4, 2013 iMac

Case 10: Many Users experience against some antivirus that has been blocked some wifi port and a cant open web browser or Application.

You might also like: How to set a password on Mac WiFi hotspot

Here listed cases are possible solutions recommended by brody for fixed network issues in case Wifi not working on Mac Mojave or macOS Big Sur, Catalina, OS X, iMac, MacBook Pro, MacBook Air, and Others. After that, you can’t short out your wifi issue than contact Apple support.

Jaysukh Patel is the founder of howtoisolve. Also self Professional Developer, Techno lover mainly for iPhone, iPad, iPod Touch and iOS, Jaysukh is one of responsible person in his family. Contact On: [email protected] [OR] [email protected]

We will be happy to hear your thoughts

Leave a reply