Macos: cannot do recursive NS lookups

[Greg Choules]

Hello Mark.
I have the current MacOS on Apple Silicon and 9.20.22, installed via
Homebrew, and it works for me.
Perhaps you could share your config, dig test and results and maybe a pcap.

Cheers, Greg


On Tue, 5 May 2026 at 16:57, Mark Strohm <markdstrohm at gmail.com> wrote:

> After recent updates on my Macos systems, bind can no longer do recursive
> NS lookups.  dig returns SERVFAIL.  Any help would be much appreciated.
>
> This is happening for different versions of bind and different Macos
> versions.
>
> Here are log entries from a Homebrew install of 9.20.22 on Darwin x86_64
> 24.6.0:
>
> 05-May-2026 08:12:17.869 resolver: notice: DNS format error from
> 51.75.79.143#53 resolving isc.org/NS for 127.0.0.1#53629: non-improving
> referral
> 05-May-2026 08:12:17.869 lame-servers: info: FORMERR resolving '
> isc.org/NS/IN': 51.75.79.143#53
>
> 05-May-2026 08:14:28.659 resolver: notice: DNS format error from
> 193.0.14.129#53 resolving ./NS for <unknown>: non-improving referral
> 05-May-2026 08:14:28.659 lame-servers: info: FORMERR resolving './NS/IN':
> 193.0.14.129#53
> 05-May-2026 08:14:28.659 resolver: notice: resolver priming query
> complete: SERVFAIL
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