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  1. #1
    Late-2011 MacBook Pro’s and Snow Leopard
    Has any member here performed a software downgrade from the pre-installed Lion 10.7.2 to Snow leopard 10.6.8 on any late-2011 MacBook Pro (any size) and if it was successful or failed and what you found? Thank you.

  2. #2

    IWT's Avatar
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    Your Mac's Specs
    Late 2015 5K 27-inch Retina iMac, 4GHz i7, 32GB RAM, 1TB Flash Drive, macOS High Sierra 10.13.6
    If your Mac shipped with Lion, then it cannot run any Operating System earlier than that - which would include Snow Leopard.

    Ian
    Ian

  3. #3

    ferrarr's Avatar
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    Your Mac's Specs
    L2014 Mac mini macOS Mojave, iPhone 8+ iOS 12, 12.9" iPad Pro 1 iOS 12, Pencil 1
    When I bought my Late 2011 MBP off eBay, it came with Snow Leopard already installed.

    You would need to use the Snow Leopard install disc, to erase the internal drive, then you will be able install Snow Leopard, I believe. When you erase the disk, make sure you make it one single partition, so you will erase the Lion recovery partition as well.
    -- Bob --
    Please backup. Everything has a life cycle, unexpected and warning free. Nothing will last as long as you want it to.

  4. #4

    harryb2448's Avatar
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    Your Mac's Specs
    iMac, i7 4GHz, 32GB memory, 1TB Blade, OS X.14.2 Mojave,
    Early MBP 2011came with Snow Leopard OS X.6.6. Late 2011 all came with Lion OS X.7.2.
    Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  5. #5

    chscag's Avatar
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    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, Mojave
    Quote Originally Posted by BondAMR View Post
    Has any member here performed a software downgrade from the pre-installed Lion 10.7.2 to Snow leopard 10.6.8 on any late-2011 MacBook Pro (any size) and if it was successful or failed and what you found? Thank you.
    A software downgrade to Snow Leopard can't be done on that model since it was pre-installed with Lion. You may be able to create another partition and install Snow Leopard to that partition but the initial boot up will be to Lion. There may be a work around somewhere and you're welcome to search for it.

  6. #6
    so I've found some workarounds to install Snow Leopard on a mid-2011 MBA and a late-2011 MBP and when I get the MBP next week, I'll try to do the install and post a step-by-step process for anyone else that may want to try it.

  7. #7

    chscag's Avatar
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    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, Mojave
    Okay, great. When you get it working, post the step by step instructions for others to see.

  8. #8

    pm-r's Avatar
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    so I've found some workarounds to install Snow Leopard on a mid-2011 MBA and a late-2011 MBP and when I get the MBP next week,

    I'd say you've got a very good chance with the mid-2011 MBA, but not so with the late-2011 MBP, but it might be an interesting exercise.

    And I believe you'll need SL 10.6.7 as a minimum. And I wonder if Apple still supplies the Rosetta add-on download that many apps needed to work properly???







    - Patrick
    ======

  9. #9

    chscag's Avatar
    Member Since
    Jan 23, 2008
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    Keller, Texas
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    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, Mojave
    And I believe you'll need SL 10.6.7 as a minimum. And I wonder if Apple still supplies the Rosetta add-on download that many apps needed to work properly???
    Rosetta is included on the Snow Leopard CD. He can still purchase that from Apple for $19.95.

  10. #10

    pm-r's Avatar
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    Quote Originally Posted by chscag View Post
    Rosetta is included on the Snow Leopard CD. He can still purchase that from Apple for $19.95.

    Maybe, and maybe also depending on the discs/versions one has, but it sure wasn't my experience the last time I installed Snow Leopard 10.6.7 (White Not for resale Disc from Apple) on my mid-2011 iMac.

    Snow Leopard: Installing Rosetta
    Mac OS X 10.6 signals a shift at Apple as the company looks to the future of its operating system, and a clear example of that was the move to offer Rosetta as an optional install instead of including it as part of the default OS installation.
    https://www.macobserver.com/tmo/arti...alling_rosetta

    Anyway, they'll discover either way soon enough I'm sure if the installation succeeds.





    - Patrick
    ======

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