Resolved Solution: No Internet Access - macOS Tahoe 26 Developer beta

[Apple MessagePad]

Those with Little Snitch installed may have no internet access. You won't even be able to reach your router or ping out, despite being correctly connected to wifi. While Content Filters will automatically disable itself with the incompatible macOS version, you need to disable DNS Proxy filtering.

System Settings > Network > VPN & Filters

Set the Little Snitch DNS Proxy filter to Disabled and internet access will return.

 

[icodeclean]

Just had this issue. Thanks!

 

[MakaniKai]

I’ve seen reports the latest Little Snitch nightly fixes it:

The Little Snitch "nightly," which surprisingly isn't brand new, appears to be working on Tahoe:

Little Snitch Nightly Build - Download

Be one of the first users of a pre-release version of Little Snitch. Download here.

www.obdev.at

It's 6.2.4, I had 6.2.3 installed and like others the internet didn't work after the upgrade. Since this happens almost year with the brand new Developer Beta OS I at least immediately guessed the cause! Long Live Little Snitch!

 

[Pgrillone]

Those with Little Snitch installed may have no internet access. You won't even be able to reach your router or ping out, despite being correctly connected to wifi. While Content Filters will automatically disable itself with the incompatible macOS version, you need to disable DNS Proxy filtering.

System Settings > Network > VPN & Filters

Set the Little Snitch DNS Proxy filter to Disabled and internet access will return.

Life saver! Thanks for taking the time to post