After macOS Ventura upgrade: WLAN problems on the Mac (+ solutions)

After upgrading to a new Mac operating system, errors can occur depending on the model and year of the Apple computer, as well as individual usage. A collection of possible problem cases for macOS 13 can be found here: macOS 13 Ventura - Issues and Solutions. In the following, I will specifically address a frequently mentioned problem - after the macOS Ventura upgrade, the WLAN is gone. If you also have WiFi problems after the macOS upgrade, you might find the right solution here. From simply turning it off and on to clearing the DNS cache, I'll go through everything.

If Wi-Fi problems occur on the Apple Mac, iMac or MacBook after installing macOS Ventura, you will (hopefully) find the solution here. I have brought you guides on how to fix WiFi errors after macOS upgrade.

If Wi-Fi problems occur on the Apple Mac, iMac or MacBook after installing macOS Ventura, you will (hopefully) find the solution here. I have brought you guides on how to fix WiFi errors after macOS upgrade.

Preview: Make sure the router is working

It would be a great coincidence that with the installation of Ventura on the Apple Mac the router suddenly went on strike and no longer wanted to provide a wireless Internet connection. However, I would like to mention that the Internet router and its Wi-Fi function should work for troubleshooting. 

With the following solutions, I assume that a functioning WiFi network is available to which you also have proper access. Accordingly, the following explanations are primarily aimed at solving problems on Apple computers. We can only help to a limited extent with router problems, although this has already been done for a Fritz!Box: Reader question – Mac keeps losing WiFi connection.

Always the first step: switch off and on again

If you have WiFi problems after macOS is coming Upgrade does not have to be a complicated system error. I had e.g. For example, I couldn't move the dock to a second screen by moving the mouse pointer to the bottom of the screen there. No matter what I tried, it didn't work. After restarting the Mac, however, it was just as easy as with Monterey and all previous macOS versions that I know. It can be similar with the Wi-Fi connection. 

If you have connection problems in apps or in the Web browser so these steps:

  1. Quits and opens the app/browser to solve possible problems in the program
  2. Turn WiFi off and on again
  3. Turns your Mac, iMac, or MacBook off and on again

Remove and re-add network

If quitting and restarting the app in question, the connection to the network, or the Apple computer itself doesn't help, then there are other solutions. If your WiFi is gone after the macOS Ventura upgrade, you can first remove the network you want to connect the computer to from its list of saved networks and then add it again. I've already told you how to do that in the big "Problems and Solutions" article shown, so here only the short form:

  1. Click on the in the menu bar Apple logo  and then up System settings ...
  2. Choose in the left category list Wifi from
  3. Scroll down and click Extended ...
  4. Select the network in question and click on the three circled dots next to it
  5. Use the menu item Remove from list and confirmed by clicking on the "Remove" button

If that doesn't help, then remove the network again and only add it again after you've done an SMC reset. You can find out how this works here: Macs without a T2 chip / Macs with T2 chip.

Turn off VPN and other intermediate steps

If you have placed certain apps between your inputs and the Internet connection, then it can also be helpful to close them to troubleshoot. From a third-party firewall to a system monitor or an antivirus program to a VPN, there can be many. Also tools like Little Snitch, iStat Menus and so on you should end to test the pure WLAN connection that is not looped through anywhere. 

If you use several such apps and tools, switch them off one by one or try different combinations. Perhaps only one software from the large collection is not yet compatible with macOS Ventura and is therefore a WLAN troublemaker. Maybe there are two. In any case, it can be worth investing a little time here to try it out.

Clear Mac DNS Cache - Terminal Instructions

If all of that didn't work, then we can't avoid it Port to strive. This Apple Mac command line is used to make changes and adjustments by entering text. But they have to follow a certain logic. You can see what that means in the step-by-step instructions for deleting the DNS cache on the Mac. 

Before that, a little explanation about the DNS itself: it is a kind of website telephone book. DNS means "Domain Name System" and describes a directory service that assigns URLs (i.e. website names) to a unique IP address - i.e. like names and numbers in the telephone book. Wi-Fi problems under macOS can be solved by deleting or resetting the cache (a kind of buffer memory).

And this is how it all works:

  1. Opens the terminal, e.g. B. by entering "terminal" and Enter in Spotlight (command+space)
  2. Copy this command into the terminal window:
    sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
  3. Press Enter to run the command
  4. Type your password if prompted and press Enter (note: the password will not be displayed, even with dots or other characters)
  5. Closes the terminal when nothing else is displayed or prompted

Incidentally, the command shown above for cleaning the Mac DNS cache only works from macOS 10.15 Catalina. If you want to clear the Domain Name System buffer memory in older Mac operating system versions, then use these commands: 

Mac operating system command
OS X 10.11 El Capitan – macOS 10.14 Mojave
sudo killall -HUP mDNSResponder
OS X Yosemite 10.10
sudo discoveryutil udnsflushcaches
Mac OS X 10.7 Lion – OS X 10.9 Mavericks
sudo killall -HUP mDNSResponder
Mac OS X 10.5 Leopard
sudo lookupd -flushcache
Mac OS X 10.4 Tiger
lookupd -flushcache

WLAN problem on macOS Ventura: delete config files

After the terminal solution, let's go into another system intervention as a solution. For this we end up in a system folder in which we have to find and delete several files. The aim of this action is to reset the WiFi module of the Apple Mac, iMac or MacBook. The files in question (see list below) can be found in the /Library/Preferences/SystemConfiguration folder. 

That's how it works:

  1. Turn off your Apple computer's Wi-Fi connection
  2. Opens a Finder-Window
  3. Select in the menu bar Go to -> Go to folder ... or press command+Shift+G
  4. Give the folder path /Library/Preferences/SystemConfiguration and press Enter
  5. Delete the existing files below (maybe one or two are missing) and restart the Mac

These are the files you should delete the existing ones from (this will remove WiFi settings so you may have to add the network again and re-enter the password):

  • com.apple.airport.preferences.plist
  • com.apple.network.eapolclient.configuration.plist
  • com.apple.wifi.message-tracer.plist
  • NetworkInterfaces. plist
  • preferences. plist
Do you want to reset the WLAN module under macOS Ventura by deleting the configurations? Then removes the existing files from the list above from the folder shown. macOS 13 Wi-Fi Issues

Do you want to reset the WLAN module under macOS Ventura by deleting the configurations? Then removes the existing files from the list above from the folder shown.

After the restart you can reconnect the Wi-Fi network. Hopefully the Mac's wireless internet connection will then work with macOS Ventura. If not, the post goes a little further. For example by selecting a different DNS server...

Change Mac DNS server: Here's how!

Another way to troubleshoot Internet issues is to reset the DNS server on Mac. This is a more advanced approach. So if clearing the cache hasn't had the desired success, then restart the Mac again, disconnect and reconnect the WLAN connection, etc. So go through all the steps again before making any major changes. 

If none of that helps, you can try the following:

  1. Click on the in the menu bar at the top left Apple logo
  2. Choose from the menu that opens System settings ... from
  3. In the System Preferences window, navigate to on the left Wifi
  4. Click on the "Details..." button in the display of the connected network
  5. In the window that opens, choose left DNS from
  6. Mark the previous entries under "DNS Server" and remove them using the minus symbol (-)
  7. Use the plus symbol (+) to add a new DNS server
  8. Use either the DNS IP of your router or that of a DNS service (e.g. 8.8.8.8 belongs to Google DNS) - you can find an overview of possible addresses at Lifewire / at WikiLeaks / at the Chaos Computer Club
A more advanced approach is to swap DNS servers to fix Wi-FI issues on Mac. It's best to check the linked pages for the best DNS for you beforehand.

A more advanced approach is to swap DNS servers to fix Wi-FI issues on Mac. It's best to check the linked pages for the best DNS for you beforehand.

Solving the WiFi problem: Reinstall macOS Ventura

If we stumble across other ways to fix macOS 13 Ventura Wi-Fi issues, we'll add them to this post. However, it can also "simply" help to reinstall macOS Ventura again. To do this, you start the Mac, the iMac or the MacBook in recovery mode (Recovery Mode). You can find out how this works here: Intel Macs / Apple Silicon Macs. 

Going back to the old system: use backup

Downgrading from macOS Ventura to macOS Monterey via Time Machine Backup – this can be a solution if absolutely nothing helps. Even if other errors and bugs appear in addition to the WLAN problems after the system upgrade on the Apple Mac, a downgrade to Monterey or another previously used system can help. 

You can use the image you created with Time Machine to do this. But also with Carbon Copy Cloner or SuperDuper! You can restore copies of the system, settings, data, folders and files that you have created. If Apple then releases a patched update version of macOS Ventura, you can dare to update again.

Sources: 1, 2

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13 comments

  1. Lutz S says:

    Oh, I remember that with WLAN from a beta, WLAN was only there for a short time, nothing worked anymore. Didn't investigate further, away from the beta. So reinstall. Only much later did I install a beta on the Macbook again, then had no more probs.

  2. Marc says:

    Hello, I have exactly the problem you describe. Pages are not called up, W-Lan on, W-Lan off. Even with Lan everything runs extremely slowly. For 56 mb download more than 2 hours are needed via LAN. Unfortunately, none of the solutions described here help. I regret the moment I installed Ventura. device trust doesn't work under Ventura either. That means remote work via Citrix no longer works either. I'm happy about possible solutions!

  3. Jambo says:

    I had the same problem. Unfortunately, none of the suggestions worked. I finally formatted everything, reinstalled Ventura and then installed my Time Machine backup via the migration assistant, then it worked again.

    • Harald says:

      Had the "Slow WiFi" issue after Ventura upgrade on my iMac (2021) too. Miserably slow, no progress with Safari. Based on the various tips I checked the network settings - and lo and behold, it's working again... I think that Kaspersky Internet Security was the "fun killer" for me !! I deactivated the two Kaspersky entries in the system settings in the "Network" menu under "Filter". From now on I rush around the internet again…. At least it worked for me now. Hope it helps you too. LG Harald

  4. Marc says:

    Hello, indeed, Kaspersky was the culprit. Throw everything down and dispose of leftovers and everything is fine again.

  5. Falk says:

    Be sure to update Little Snitch first.

  6. Albert says:

    Safari freezes: Google Maps or other pages froze during normal work.
    Input or activation of displayed links could not be made.
    Apple hotline help: Safari history completely deleted, restart –> everything runs again!

  7. Uwe says:

    No matter what I do, at the latest after the second restart everything is crap again. None of the solutions work permanently.

  8. Florian says:

    Good evening, my Mac no longer starts after the Ventura update. Apple technician diagnoses defective hard drive. Apple doesn't want to take over any of this since the device was purchased commercially and only has a 1 year warranty.
    Has anyone had a similar problem?

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