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But that will disable all updates, including those for Sequoia and XProtect.
I set the rules in their own group so I can temporarily disable them while I do a Sequoia update or run this to update xprotect manually:
Bash:
sudo xprotect version && sudo xprotect check && sudo xprotect update
 
You create a rule to block connections for /System/Library/PrivateFrameworks/MobileSoftwareUpdate.framework/Support/softwareupdated
But that will disable all updates, including those for Sequoia and XProtect.

Little Snitch 5 Help - Configuration - Create and edit rules
https://help.obdev.at/littlesnitch5/lsc-edit-rules
Protecting against malware in macOS
https://support.apple.com/en-euro/guide/security/sec469d47bd8/web
Thank you so much! I will pin this message for december, when the 'Defer90' runs out. I do hope there will be another trick to fake that your Macbook is not Tahoe capable or divert this update.

Time for some LTS versions Apple... I mean, I'm willing to try everything, but Tahoe?! Nope.
 
By December 15, Apple might consider macOS 26.0 so bad that it will no longer be available for download. So Tahoe might leave us alone until after Christmas. :)
 
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