alt Hacker NewsI run a setup like that on my (outdated) Yosemite machine to provide multiple private TLDs for local deployment/development needs.
I set that up in like 2014? Even back then it was known already that the quick /etc/resolver way was the deprecated way to do things. So I guess they finally killed that feature off?
The proper (more awkward) way is to use scutil directly (which then stores the settings in some binary plist somewhere, I assume).
Maybe try this and see if it still works afterwards?
scutil is only half the story, because some macOS lookups still go through mDNSResponder in ways that ignore or override that config, which leaves you debugging random misses and binary plist junk. At this point, unbound or dnsmasq is simpler.