Possible fix No internet after uninstalling Norton 360 Ventura

Thanks for the tip. For step 3 in the above for Ventura 13.1, I found it under "System Settings | Network | Filters | Norton 360 Content Filter". When it continues to be enabled after the uninstall, the network did not have internet access. Once changed to "Disabled" the internet access was available. As suggested, I removed by selecting it and "-", at which time the "Filters" group went away, being the only entry there. This was after the Safeboot. WiFi diagnostics (Option wifi) revealed. Successfully removed Norton 360 from 5 Macs this way. Sometimes the filter was removed by the removal software and other times not. Manual removal of the filtering using the suggested "-" at any stage seems to work. cheers.

Download and run Etrecheck.  Copy and paste the results into your reply. Etrecheck is a diagnostic tool that was developed by one of the most respected users here in the ASC and has been recommended by Apple Support to provide a snapshot of the system to help identify the more obvious culprits that can adversely affect a Mac's performance.

Copy the report

and use the Additional Text button to paste the report in your reply.

The report will tell you what reminents of Norton software are still installed and running and where they are located. To remove them you may have to boot into Safe Mode according to How to use safe mode on your Mac and delete from there.

Note:  if you have a wireless keyboard with rechargeable batteries connect it with its charging cable before booting into Safe Mode.  This makes it act as a wired keyboard as will assure a successful boot into Safe Mode.

daveweilert wrote:

Not sure this the approved method to remove a system extension but I now have networking.

Again, I'm glad you got your network running. But again, not only is that not an approved method to remove a system extension, it will not remove a system extension. It may have removed enough of the rest of the software to get your computer functional again, but you probably have pieces still running. Some of these antivirus apps run dozens of different individual processes simultaneously.

This is really tricky. A modern system extension is extremely difficult to remove. However, Apple has a built-in method to remove it. If you can find the exact app that contains the system extension, and drag that app to the trash, it will remove the system extension. You should get a special dialog confirming that you want to remove the system extension. There is another, lower-level method to remove it that should be part of an uninstallation script, but very often the developers don't code those uninstallation scripts properly and they leave the system extensions installed and running. However, if you attempt to manually uninstall these complicated system modifications, you might get lucky and remove the system extensions, but you would likely leave lots of other parts still installed and running. It's a royal mess.

I've given up trying to make sense of it. When someone wants to remove one of these low-level system extensions, I normally tell them to erase the hard drive and reinstall the operating system. Then, during the restore from backup, make sure to restore only user files and user accounts. Do not restore any apps, software, or "other files". Manually reinstall any 3rd party apps that you really want to use. This may be drastic, but it is the only guaranteed method that I can reasonably convey in a forum like this.

I had the same problem on two different Macbooks, even after using the "official" Norton uninstaller script. I finally looked in network preferences and noticed that Norton was still attempting to start (status was "starting"). I highlighted the Norton network process then tapped the minus (-) button at the bottom and it was eliminated. This is another way to do it, similar to kernDog272's method of going in through system preferences. The Internet immediately started working, so the Norton internet blocking process was still infecting the system.

I concluded that Norton does not even know how to properly de-install their own lousy software, so I have little confidence they really know what they are doing.

After uninstalling Norton 360 on my MacBook Pro with Ventura 13.0.1 my networking capabilities would not work.

If I would stop and then restart my MacBook the network would work for less than a minute. After that I couldn't couldn't ping, browse, no networking of any kind.

Tried Restarts and total Shutdown and Restart, the issues continued. Using my phone I was able to search the internet and found others were also having issues

I used a software tool 'Find Any File' and searched for files with 'symantec' in the name. There were several files and was able to locate a system extension was still on system along with log files, browser files in the HTTPStorages, etc. I moved ALL files that contained 'symantec' to Trash, rebooted and the issue went away.

Not sure this the approved method to remove a system extension but I now have networking.

Hope this helps others. Happy computing.

Congratulations on getting your networking back.

However, I can virtually guarantee that parts of Norton are still running on your computer.

Very dapper looking there 😉

Ho (ribbit), Ho (ribbit), Ho (ribbit)!