Thursday, April 3, 2025

What’s preventing DNS resolution on your freshly minted MacBook Pro running macOS Sequoia?

Unwrapped and barely 5 minutes old, my hands now cradle the sleek, newly minted MacBook Pro. It is working macOS Sequoia. The internal DNS setup seamlessly integrates with external devices, allowing effortless connectivity for various gadgets, including iPhones and iPads, which function flawlessly within the established DNS infrastructure.

I manage Pi-hole internally to leverage its ad-blocking benefits and provide a reliable DNS server within my local network.

I possess the capacity to excavate internal information and procure predicted results, as evident in this instance:

me@MacBook-Professional ~ % dig storage.residence.lan ; <<>> DiG 9.10.6 <<>> storage.residence.lan ;; world choices: +cmd ;; Received reply: ;; ->>HEADER<<- opcode: QUERY, standing: NOERROR, id: 55954 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: model: 0, flags:; udp: 1232 ;; QUESTION SECTION: ;storage.residence.lan.      IN  A ;; ANSWER SECTION: storage.residence.lan.   0 IN a 172.16.10.5 ;; Question time: 4 milliseconds ;; SERVER: 172.16.10.2#53(172.16.10.2) ;; When: Thursday, December 12, 19:58:25 MST 2024 ;; MSG SIZE received: 61 

Despite efforts to establish a connection via SSH, access the resources using an internet browser, or initiate a ping command, none of these attempts succeed. Despite discovering both services, attempts to bounce Discovery and mDNS still falter.

me@MacBook-Professional ~ % sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist Password: Unload failed: Error 5: Input/Output error Try using 'launchctl bootout' as root for more detailed errors. me@MacBook-Professional ~ % sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist Load failed: Error 5: Input/Output error Try running 'launchctl bootstrap' as root for more informative errors. me@MacBook-Professional ~ % sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist Unload failed: Error 5: Input/Output error Try using 'launchctl bootout' as root for more detailed errors. me@MacBook-Professional ~ % sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist Load failed: Error 5: Input/Output error Try running 'launchctl bootstrap' as root for more informative errors. 

I’ve rebooted just to enjoy myself, but that didn’t fix the problem either. This clarity is crucial: specifically, this development also affects internet browsers directly. That’s a minor drawback.

Can you configure your Mac to seamlessly integrate with your preferred DNS and network setup for optimal performance and security?

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