OS X Yosemite Desktop

In addition to the new iOS 8.4 software update with a redesigned Music app, Beats 1 radio and Apple Music for the iPhone, iPod touch and iPad, Apple also released the free OS X Yosemite 10.10.4 software update for Macs.

In addition to various other big fixes, enhancements and nice-to-haves, this release of OS X Yosemite gets rid of the dreaded “discoveryd” network process which was responsible for a range of network issues, marking the return of the old but way more reliable “mDNSResponder” process.

In order to apply the update, open the Mac App Store on your Mac and click the Updates tab.

OS X 10.10.4 update prompt

As I explained before, OS X 10.10.4 should fix a number of complaints regarding Yosemite’s Wi-Fi performance, ranging from intermittent connections, taking a long time to re-connect to a wireless network after waking a Mac from sleep, reduced Wi-Fi performance, discoveryd eating up system resources and leading to excessive battery drain, and more.

Security content of various Apple updates is listed here.

Here’s what applying OS X Yosemite 10.10.4 does to your Mac:

  • Improves networking reliability
  • Improves Migration Assistant reliability
  • Addresses an issue that prevented some external displays from functioning properly
  • Improves the reliability of upgrading iPhoto and Aperture libraries to Photos
  • Improves reliability when syncing photos and videos to iCloud Photo Library
  • Addresses an issue that could cause Photos to unexpectedly quit after importing some Lecia DNG files
  • Resolves an issue that could delay outgoing email messages in Mail
  • Fixes an issue where a website could prevent the user from navigating away by presenting repeated JavaScript alerts in Safari

For enterprise customers, OS X 10.10.4 addresses an issue where OS X systems bound to directory services could stop responding under certain conditions, adds the ability to create mobile accounts with the createmobileaccount tool and fixes an issue in Profile Manager that could allow a user to install pre-release software even when the setting is disabled.

It’s always a good idea to back up your Mac before installing major OS X updates.

If you use Time Machine, just open System Preferences > Time Machine, tick the “Show Time Machine in menu bar” box. Now click the Time Machine icon in menu bar and choose Backup Now.

This way, if anything goes awry during the OS X 10.10.4 update process, you’ll have a full backup of your Mac available in Time Machine.

  • Mr.Coolfreak

    Is discoveryd in iOS 8.3? I have wifi issues on my iPhone but Mac is pretty good

    • Yes, and it is removed in iOS 8.4 and iOS 9 beta.

  • Mee

    ‘t0″ and “discovered”

    • Mee


      • d stands for daemon, not a typo

  • Gary LE

    Sometimes my early 2015 mbp with the second most recent osx (not 10.10.4) bluetooth icon has a swiggly line after wake up from sleep. What causes this!

  • Manor

    Does anyone know when does Apple Music come to the Mac?

  • Matt

    Combo update link?

  • Greg Warren

    I got so excited with the subtitle for Photos improvements, thinking maybe they would include being able to tag photos easier, or something substantial. I don’t want to belittle the importance of making the import process more reliable, but when it comes to some basic features and ease of use, Photos kind of sucks.

  • James G

    So no Apple Music in OS X? Seems like a miss…

  • Andrieux Querido

    Any idea if it fix SLOW Airplay from Macs to Apple TV???

    • iFLoWx7

      i didn’t see or find any solution or fix yet, I’ve been with this since the first release of Yosemite, smh Apple, very disappointing.

  • iFLoWx7

    the problem with the external display still not solved and mirroring on iMac to Apple TV is not working at all 🙁 this is ridiculous and tedious !!!! its been too long already Apple!!!

  • Ank24

    i don’t know why… but my iTunes(12.2) is not responding after the Yosemite 10.10.4 update …can someone help me with this?

    • Ank24

      ok never mind…. a simple restart fixed it

  • Dr J

    Downloaded 10.10.4. Now I have MORE problems with WiFi connections than before!! POS!!! Why can’t Apple just FIX THIS???