No Internet on 2 of 3 Ventura Upgrades / 1 no longer able to boot (Fixed - Update LittleSnitch BEFORE Upgrading to Ventura)

[thebluepointe]

Upgraded 3 Macs to Ventura. 2 of 3 do not have access to internet.
- No Internet on Wi-Fi
- No Internet on Ethernet
- No Internet on secondary Wifi Access Point
- No internet using iPhone as hot spot
- Everything else on the network has internet access.
- LOCAL NETWORK Works fine
- VNC Works, but is VERY slow
- Both computers had internet access and were able to download the update prior to upgrading.
- No changes to network settings were made, prior to install.

Devices:
- No Internet on M1 Mac Mini
- No Internet on 2019 MacBook Pro (Intel) - Tried rebooting...system no longer able to boot. Freezes and immediately. powers off @ 50% loading bar.
- Everything working fine on M1 MacBook Pro

Tried:
- Changing IP from DHCP to Static
- Changing/Adding DNS Servers
- Swapping Ethernet Cables with known working computer
- Safari Says: You are Not Connected to the Internet

 

[thebluepointe]

The answer is upgrade LittleSnitch to v5.5 BEFORE upgrading.

If you screwed up, like I did. Quit Little Snitch (or, if it won't, which happened to me...use Activity monitor to kill Little Snitch)

Install v5.5

Little Snitch - Download

Get Little Snitch now and protect your privacy.

obdev.at

Replace existing with new download.

 

[Solenoid289]

This happened to me as well.
Unfortunately uninstalling Little Snitch didn't solve the issue, so I had wiped out my entire SSD and clean installed to restore internet connection.
Be careful Little Snitch users...

 

[Mac... nificent]

Same here. No internet after update.

 

[Subhankar]

Same here. No internet after updgrade.

--- Update: Issue solved. Please refer to my reply on this same message for the solution.

 

[Martyimac]

Same here. No internet after updgrade.

Same here. No internet after update.

One possibility, if you use a VPN, is to insure the "kill switch" option is turned OFF, or disabled, if your VPN has a kill switch. PIA does and that was causing the same issue with me. Once I turned off the kill switch everything started working again.

 

[Asoma64]

I deleted some configuration files and it worked but I restarted my computer and same issue

 

[Mac... nificent]

One possibility, if you use a VPN, is to insure the "kill switch" option is turned OFF, or disabled, if your VPN has a kill switch.

No VPN installed.

 

[Subhankar]

Same here. No internet after updgrade.

I found that the issue was with my Kaspersky Antivirus. Disabled the content filter under network tab and it worked.
Then I uninstalled Kaspersky, restarted system and again installed latest Kaspersky. Now everything is working fine.

 

[platonicbomb]

One possibility, if you use a VPN, is to insure the "kill switch" option is turned OFF, or disabled, if your VPN has a kill switch. PIA does and that was causing the same issue with me. Once I turned off the kill switch everything started working again.

I don't have Little Snitch. I disabled kill switch on PIA (though I did not have it open anyway). Still no internet.

I tried Command + Option + Shift +R to install Catalina, and third try it told me to choose the drive on which to install, but no drive was visible. Hard drive does not appear to be damaged.

 

[m5c]

Only thing that helped in my case is the solution described here:

Fix Wi-Fi & Internet Connection Problems in macOS Ventura

Some users are reporting wi-fi connection issues and other internet connectivity problems after updating to MacOS Ventura 13. The problems can range from slow wi-fi connections or reconnections, wi…

osxdaily.com

In essence, close all programs, delete (or move elsewhere to backup) these files, reboot:
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/Preferences/SystemConfiguration/com.apple.network.eapolclient.configuration.plist
/Library/Preferences/SystemConfiguration/com.apple.wifi.message-tracer.plist
/Library/Preferences/SystemConfiguration/preferences.plist