whats special about ios 12.6.6

Well, if you manage to boot a MacBook Pro with iOS, that would be incredibly special.

At this point, the only changes to macOS 12 will be security fixes.

If you dig into the linked article at the top of the page, you can eventually get to this: About the security content of macOS Monterey 12.6.6 - Apple Support

Writing an effective Apple Support Commun… - Apple Community