Apple Replaces Problematic 'Discoveryd' Process With mDNSresponder in 10.10.4 Beta 4

In today's fourth OS X 10.10.4 beta, Apple made a significant behind-the-scenes change that could result in improved networking performance for some users -- the removal of the "discoveryd" process. As noted by MacRumors forum members and 9to5Mac, in OS X 10.10.4 beta 4, the discoveryd process has been replaced by mDNSresponder.

Since OS X Yosemite debuted in October, there have been ongoing complaints about discoveryd consuming CPU resources, draining battery life, and causing issues with Wi-Fi. These problems have lingered for several months, even after multiple bug fixes and performance improvements included in OS X 10.10.1, 10.10.2, and 10.10.3.

discoverydmdnsresponder
Discoveryd was introduced with OS X Yosemite, replacing mDNSResponder for managing Mac networking tasks, but it's led to a host of problems like those listed above along with issues like slow wake from sleep, failures to resolve DNS names, duplicate machine names, and more, as detailed in a post earlier this year by Ars Technica. Several developers have also complained about discoveryd in Yosemite, including Instapaper's Marco Arment and Iconfactory's Craig Hockenberry.

It's no secret in the tech community that discoveryd is the root cause of so many problems. There are even crazy workarounds. With so many issues, you'd expect some information from Apple explaining ways to mitigate the problems.

The removal of the unstable discoveryd process in OS X 10.10.4 beta 4 may improve network stability problems for many users who have been experiencing continual issues. With the removal of discoveryd, Apple has reverted back to using the earlier mDNSresponder process that was used before discoveryd was implemented with OS X Yosemite.

Top Rated Comments

Menopause Avatar
76 months ago
Plot Twist: They renamed discoveryd to mDNSresponder to see if there's placebo effect :eek:
Score: 80 Votes (Like | Disagree)
ButteryScrollin Avatar
76 months ago
I haven't updated my OS since the last 10.6 came out, because there are no compelling new features they've added, but there have been compelling new bugs to be avoided.

Not having an OS riddled with security vulnerabilities would be a compelling feature to me.
Score: 43 Votes (Like | Disagree)
motulist Avatar
76 months ago
I haven't updated my OS since the last 10.6 came out, because there are no compelling new features they've added, but there have been compelling new bugs to be avoided.
Score: 19 Votes (Like | Disagree)
sillypooh Avatar
76 months ago
I think this says quite a bit on Apples management and QA. Having to roll back older versions of software, to fix newer releases, that has to hurt a lot.

Now, if they also roll back 10.6.8, with security fixes, then I'll be happy. I can live without all the extra fluff later versions added.

Seriously, ever since Lion, the quality of the desktop software has been going down significantly and the features have been more and more redundant and insignificant. Here's Mavericks for me:
_ file sharing doesn't work as it should and connecting to servers other than by doing cmd-K is a lost cause. Forget about keeping shortcuts in the Finder.
_ Quicktime doesn't work with anything else but .mov, it's ridiculous
_ QuickView, by extension (with the whole missing QT API documentation, no support for Perian, missing third-party codecs thing) won't preview any video other than .mov and .mp4
_ Airdrop has never worked with me

The state of iTunes is just sad. The worst software ever made as the centre of your media and devices! Saying that it's not intuitive and convoluted would be the euphemism of the year. Friends with many years on Apple products, and regular iTunes users, keep asking me "hey, how do I add music to my phone?". It's not funny! Properly backing up your photos has to be done outside the app, and disabling seemingly unecessary cloud services threaten to wipe out your phone! All of these things should be simple and straightforward.

None of the new features of recent OS X iterations make my workflow any easier or faster. However, the bugs slow me down.

10.6.8 is so far, undeniably, the gold standard in efficiency in OS X workflow. And I should know, I've been on this train since MacOS 6!

As much as I love social media features on my phone, they should not be significant additions to our desktop OSes. All these "new features" shows how little Apple now understands its desktop user-base.
Score: 15 Votes (Like | Disagree)
antonis Avatar
76 months ago
So all these people complaining about wifi issues were right, from the beginning.
Score: 11 Votes (Like | Disagree)
charlien Avatar
76 months ago
Thank you. I may install the beta just for this.
Score: 10 Votes (Like | Disagree)

Top Stories

imac pro featured black

Apple Confirms iMac Pro Will Be Discontinued When Supplies Run Out, Recommends 27-Inch iMac

Saturday March 6, 2021 7:33 am PST by
Apple on late Friday evening added a "while supplies last" notice to its iMac Pro product page worldwide, and removed all upgrade options for the computer, leaving only the standard configuration available to order for now. We've since confirmed with Apple that when supplies run out, the iMac Pro will no longer be available whatsoever. Apple says the latest 27-inch iMac introduced in August...
bloodoxygenapplewatch

Apple Watch Series 7 to Gain Breakthrough New Health Feature

Friday March 5, 2021 5:34 am PST by
Apple is reportedly planning to bring a new, first-of-its-kind health technology to the Apple Watch Series 7, in what could be a breakthrough for managing conditions such as diabetes more easily. According to a recent report from ETNews, the Apple Watch Series 7 will feature blood glucose monitoring via a non-invasive optical sensor. Measuring blood glucose levels, also known as blood...
Top Stories 48

Top Stories: iPhone 13 Leaks, OLED iPads and Macs, New AirTags Evidence

Saturday March 6, 2021 6:00 am PST by
iPhone rumors are heating up, with noted analyst Ming-Chi Kuo this week releasing a wide-ranging report outlining his expectations for the iPhone lineup over the next three years. This week also saw rumors about OLED displays potentially coming to iPad and Mac starting next year, increasing signs of AirTags functionality in iOS 14.5 betas, and more, so check out all of the details below! i...
apple products refurbished store banner

Class Action Lawsuit Over Apple Providing Refurbished Replacement Devices Proceeding to Trial in August

Friday March 5, 2021 9:53 am PST by
Initially filed in 2016, a class action lawsuit that accuses Apple of violating the Magnusson-Moss Warranty Act, Song-Beverly Consumer Warranty Act, and other U.S. laws by providing customers with refurbished replacement devices is set to proceed to trial August 16, according to a notice this week from law firm Hagens Berman Sobol Shapiro LLP. Apple's repair terms and conditions state that,...
Oled iPads and MackBook Pro

OLED 10.9-Inch iPad Rumored for Early 2022, 12.9-Inch iPad Pro and 16-Inch MacBook Pro Could Follow

Thursday March 4, 2021 8:37 pm PST by
Earlier today, DigiTimes shared a preview of an upcoming report claiming that Apple is working on both iPad and Mac notebook models with OLED displays that could launch starting in 2022. The full report from DigiTimes is now available, and it includes several new alleged details about Apple's plans. According to the report, the first of these devices to adopt an OLED display is likely to be...
iPhone 13 Notch Feature2

iPhone 13 Rumor Recap: Smaller Notch, Larger Batteries, 120Hz for Pro Models, Improved 5G, Wi-Fi 6E, and More

Friday March 5, 2021 8:20 am PST by
While we are likely at least six months away from Apple unveiling the so-called iPhone 13 lineup, rumors about the devices are starting to accumulate, so we've put together this recap of everything that is expected so far. The upcoming iPhone 13 lineup will consist of the same four models and the same screen sizes as the iPhone 12 lineup, according to reputable analyst Ming-Chi Kuo,...
imac pro while supplies last

iMac Pro No Longer Custom Configurable, Available 'While Supplies Last'

Friday March 5, 2021 10:14 pm PST by
Apple appears to be on the verge of discontinuing the iMac Pro, with the store page for the high-end all-in-one Mac including a "While supplies last" tagline and only the base model with no custom configurations available for purchase. The iMac Pro launched in December 2017, and while there have been a few tweaks to the available configurations over the years, it has received no substantial...
hlh030121feafutureoffitness012 1614286673

A Look Inside Apple's 23,000 Square-Foot Fitness+ Studio

Friday March 5, 2021 10:59 am PST by
Apple Fitness+, the latest service to join the Apple family, integrates tightly with the Apple Watch to offer a comprehensive and growing selection of workout and exercise videos made by a team of professional trainers. Apple Fitness+ Studio (via Men's Health) Apple curates and records all of the videos at a location in Santa Monica, California, and each video features a similar background...
maxresdefault

What's on Your iPhone Home Screen?

Thursday March 4, 2021 10:31 am PST by
Over on our YouTube channel, MacRumors videographer Dan has a new video up where he shares his Home Screen, wallpaper, and all of his current favorite widgets. Subscribe to the MacRumors YouTube channel for more videos. Check out Dan's video to see his setup, and then comment below and show us your own Home Screens. It's always fun to see other peoples' Home Screens, and with widgets and...
microsoft edge vertical tabs

Microsoft Edge 89 Brings Vertical Tabs and New History View

Friday March 5, 2021 4:06 am PST by
Microsoft has officially released version 89 of its popular Chromium-based Edge browser, bringing its long-trialed vertical tabs feature to Mac for the first time. Vertical tabs are intended to make more efficient use of screen space, and should prove a welcome addition for users browsing on 16:9 ratio displays in particular. Users can click vertical tabs to switch between them and...