HT202757: OS X Mavericks: Only connect OS X Mavericks Fusion drives to OS X Mountain Lion v10.8.5 or later

Learn about OS X Mavericks: Only connect OS X Mavericks Fusion drives to OS X Mountain Lion v10.8.5 or later
RGNeter
Level 1 (4 points)
Desktops

Q: Has the incompatibility issue explained here: https://support.apple.com/en-us/HT202757 been resolved if the destination fusion drive is in a Mac mini (late 2014) running 10.11.4?

Has the incompatibility issue explained here: https://support.apple.com/en-us/HT202757 been resolved if the destination fusion drive is in a Mac mini (late 2014) running 10.11.4?

Mac mini, OS X El Capitan (10.11.4)

Posted on May 12, 2016 4:18 AM

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RGNeter

Q: Has the incompatibility issue explained here: https://support.apple.com/en-us/HT202757 been resolved if the destination fusion dri ... more

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  • by lllaass,

    lllaass lllaass May 12, 2016 5:45 AM in response to RGNeter
    Level 10 (188,739 points)
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    May 12, 2016 5:45 AM in response to RGNeter

    Just what do you mean? The article says it applies t Mountain Lion and later?

    Just do what the article says.

  • by RGNeter,

    RGNeter RGNeter May 12, 2016 7:12 PM in response to lllaass
    Level 1 (4 points)
    Desktops
    May 12, 2016 7:12 PM in response to lllaass

    I assume the Apple engineers are working to correct this issue.

    The article was dated last March. My question applies to today. I’m merely asking if the engineers have been successful and incorporated that solution into the latest OSX 10.11.4 update as described?

    (For the record, I need to maintain the older pre-10.8.5 OSX on the (non-fusion) hard drive in order to run some dated third party software, so I can’t upgrade that drive’s OSX as the article suggests.)

  • by lllaass,

    lllaass lllaass May 13, 2016 12:51 AM in response to RGNeter
    Level 10 (188,739 points)
    Desktops
    May 13, 2016 12:51 AM in response to RGNeter

    I do not think it will be changed It seems to be due how the different versions of OSX work.

  • by John Lockwood,

    John Lockwood John Lockwood May 13, 2016 8:52 AM in response to RGNeter
    Level 6 (9,309 points)
    Servers Enterprise
    May 13, 2016 8:52 AM in response to RGNeter

    The article you are referring to is basically saying - don't connect a Fusion drive to a Mac running an older version of OS X.

     

    This will never change, this is because older versions of OS X do not have the newer software included in them to allow them to 'understand' the newer disk format capabilities used as part of a Fusion formatted drive. This new software is called 'Core Storage'. See https://en.wikipedia.org/wiki/Core_Storage

     

    For a similar reason really old versions of Mac OS X cannot understand FileVault2 encryption because FileVault2 also uses newer Core Storage features.

     

    There is no chance Apple will ever add support for Core Storage to really old versions of OS X, Apple do not add features to discontinued versions of OS X and only provide security fixes for the last couple of versions of OS X which will not help either.

     

    Having a separate older Mac dedicated to running your old applications may be the safest option. You should also seek to replace those older applications or accept the drawbacks of having to as an example dedicate an older Mac to them.

     

    As a comparison I also for my own personal use have some older applications, I use a separate older Mac to run them. I know and realise that eventually this older Mac may die and not be economical to repair or replace with another older Mac. I therefore do not rely on it for anything important.