Chapter in this post:
- 1 Preview: Makes sure the router is working
- 2 Always the first step: switch off and on again
- 3 Remove and re-add network
- 4 Turn off VPN and other intermediate steps
- 5 Clear Mac DNS Cache – Terminal Instructions
- 6 WLAN problem under macOS Ventura: delete config files
- 7 Change Mac DNS server: Here's how!
- 8 Solving the WiFi problem: Reinstall macOS Ventura
- 9 Going back to the old system: use backup
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.
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:
- Quits and opens the app/browser to solve possible problems in the program
- Turn WiFi off and on again
- 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:
- Click on the in the menu bar Apple logo and then up System settings ...
- Choose in the left category list Wifi from
- Scroll down and click Extended ...
- Select the network in question and click on the three circled dots next to it
- Use the menu item Remove from list and confirmed by clicking on the "Remove" button
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:
- Opens the terminal, e.g. B. by entering "terminal" and Enter in Spotlight (command+space)
- Copy this command into the terminal window:
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
- Press Enter to run the command
- Type your password if prompted and press Enter (note: the password will not be displayed, even with dots or other characters)
- 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|| |
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:
- Turn off your Apple computer's Wi-Fi connection
- Opens a Finder-Window
- Select in the menu bar Go to -> Go to folder ... or press command+Shift+G
- Give the folder path /Library/Preferences/SystemConfiguration and press Enter
- 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):
- NetworkInterfaces. plist
- preferences. plist
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:
- Click on the in the menu bar at the top left Apple logo
- Choose from the menu that opens System settings ... from
- In the System Preferences window, navigate to on the left Wifi
- Click on the "Details..." button in the display of the connected network
- In the window that opens, choose left DNS from
- Mark the previous entries under "DNS Server" and remove them using the minus symbol (-)
- Use the plus symbol (+) to add a new DNS server
- Use either the DNS IP of your router or that of a DNS service (e.g. 184.108.40.206 belongs to Google DNS) - you can find an overview of possible addresses at Lifewire / at WikiLeaks / at the Chaos Computer Club
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.
After graduating from high school, Johannes completed an apprenticeship as a business assistant specializing in foreign languages. But then he decided to research and write, which resulted in his independence. For several years he has been working for Sir Apfelot, among others. His articles include product introductions, news, manuals, video games, consoles, and more. He follows Apple keynotes live via stream.
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