HT204928: About the OS X Yosemite v10.10.4 Update

Learn about About the OS X Yosemite v10.10.4 Update
tag Gallagher
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Q: I have already installed 10.10.5 and wish to revert to 10.10.4.  Can I do so simply installing 10.10.4?

I have already installed 10.10.5 and wish to revert to 10.10.4.  Can I do so simply installing 10.10.4?

iMac (27-inch, Late 2012), OS X Yosemite (10.10.5)

Posted on Oct 19, 2015 8:49 AM

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tag Gallagher

Q: I have already installed 10.10.5 and wish to revert to 10.10.4.  Can I do so simply installing 10.10.4?

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  • by Kurt Lang,

    Kurt Lang Kurt Lang Oct 19, 2015 9:20 AM in response to tag Gallagher
    Level 8 (37,897 points)
    Mac OS X
    Oct 19, 2015 9:20 AM in response to tag Gallagher

    Only if you downloaded the full 10.10.4 installer while it was available and saved it. Otherwise, no.

  • by tag Gallagher,

    tag Gallagher tag Gallagher Oct 19, 2015 9:49 AM in response to Kurt Lang
    Level 1 (4 points)
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    Oct 19, 2015 9:49 AM in response to Kurt Lang

    Thank you.  I downloaded just now from Apple Support site 10.10.4 dogs in both normal and combo versions, 1.09GB and 2.07GB respectively.   I believe these are full installs, but maybe I'm wrong?

  • by Kurt Lang,

    Kurt Lang Kurt Lang Oct 19, 2015 10:01 AM in response to tag Gallagher
    Level 8 (37,897 points)
    Mac OS X
    Oct 19, 2015 10:01 AM in response to tag Gallagher

    No. What you found were both older update files. One is the delta updater, which is only good for updating 10.10.3 to 10.10.4, and the larger one is the Combo updater which will update anything from 10.10.0 through 10.10.3 up to 10.10.4.

     

    Apple only keeps the latest full installer versions of OS X available through the App Store. So if you go into your App Store account and choose to download Yosemite, you will always get 10.10.5.

     

    The full installer is a bit over 5 GB.

  • by tag Gallagher,

    tag Gallagher tag Gallagher Oct 19, 2015 10:20 AM in response to Kurt Lang
    Level 1 (4 points)
    Publishing
    Oct 19, 2015 10:20 AM in response to Kurt Lang

    Thanks.  Too bad.  Are there ways of getting hold of the full 10.10.4 installer?   (Which I did download once upon a time.)

  • by Kurt Lang,

    Kurt Lang Kurt Lang Oct 19, 2015 10:36 AM in response to tag Gallagher
    Level 8 (37,897 points)
    Mac OS X
    Oct 19, 2015 10:36 AM in response to tag Gallagher

    I'm afraid not. You would have had to save it on an external drive at the time the full installer was at 10.10.4. Avoid any and all temptation to download it from an illegal sharing site (or anywhere you may find it on the Internet that is not Apple). Such downloads are almost always loaded with "extras" you don't want on your computer. Like keyloggers, backdoors and other malware.

     

    You might have a chance at an Apple Store. Ask if you can get a copy of the full 10.10.4 installer there. Since you do have Yosemite under your App Store account, you'll still be able to install it when it asks for an App Store ID and password. Which of course will be yours.

  • by tag Gallagher,

    tag Gallagher tag Gallagher Oct 19, 2015 10:39 AM in response to Kurt Lang
    Level 1 (4 points)
    Publishing
    Oct 19, 2015 10:39 AM in response to Kurt Lang

    Thanks.  I'll try.

  • by Eric Root,

    Eric Root Eric Root Oct 19, 2015 12:17 PM in response to tag Gallagher
    Level 9 (72,223 points)
    iTunes
    Oct 19, 2015 12:17 PM in response to tag Gallagher

    Do you have a backup that you could restore to your computer when you were running 10.10.4?