Apple has fixed a bunch of OS X Yosemite's bugs since releasing it last fall, but one big one remained: the error-prone discoveryd DNS service was still present in 10.10.3, and it was still causing problems.
Today, Apple released a new beta build of the OS X 10.10.4 update, and it turns out that Apple's fix for the problem was the same as ours: 9to5Mac reports that the discoveryd service is gone, and it's been replaced by the mDNSResponder service that handled DNS in Mavericks and older versions. That doesn't mean discoveryd is gone for good—Apple could try to fix its bugs and reinstate it in a future update, or it could even be reintroduced in a future OS X 10.10.4 build—but it does appear to be gone for now.
Apple has never really articulated why the mDNSResponder process was replaced in the first place. Some have guessed that AirDrop and Handoff might rely on certain discoveryd functionality, but those features kept working if you manually replaced discoveryd with mDNSResponder, and they're apparently still working in this 10.10.4 build. We'll continue to track this as Apple puts out new versions of OS X.
Read on Ars Technica | Comments
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