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Q: Install Snow Leopard on new MacBook Air?

Since this comes with Lion installed, is it possible to downgrade to Snow Leopard? Is there anything that would prohibit me from booting up with a Snow Leopard disk?

Posted on Jul 20, 2011 9:11 AM

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Q: Install Snow Leopard on new MacBook Air?

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  • by SansPareil,

    SansPareil SansPareil Feb 25, 2013 1:31 AM in response to Celeri
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    Feb 25, 2013 1:31 AM in response to Celeri

    Same thoughts as you, I continue to look...

  • by SansPareil,

    SansPareil SansPareil Feb 26, 2013 12:14 AM in response to Celeri
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    Feb 26, 2013 12:14 AM in response to Celeri

    I tried these kexts from Lion's, without success

    AppleBacklight.kext 170.2.2

    AppleBacklightExpert.kext 1.0.4

    AppleHIDKeyboard.kext 160.7

    AppleMultitouchDriver.kext 231.4

    AppleUSBMultitouch.kext 230.5

    AppleUSBTopCase.kext 227.6

    IOHIDFamily.kext 1.7.1

    IOUSBFamily.kext 5.1.0

     

    For the trackpad 0x024a, one ID should be changed ?

    And where ?

  • by SansPareil,

    SansPareil SansPareil Mar 8, 2013 8:25 AM in response to SansPareil
    Level 1 (0 points)
    Mar 8, 2013 8:25 AM in response to SansPareil

    AppleUSBMultitouch.kext 227.1

    AppleUSBTopCase.kext 225.2

    IOUSBFamily.kext 4.5.8

     

    active the keyboard setting buttons

  • by Celeri,

    Celeri Celeri Mar 8, 2013 9:18 AM in response to SansPareil
    Level 1 (5 points)
    Mar 8, 2013 9:18 AM in response to SansPareil

    AppleUSBMultitouch.kext was already installed on my system, but as soon as I installed AppleUSBTopCase.kext, the keyboard started to work normally : good shot !

     

    I prefer not installing IOUSBFamily.kext 4.5.8 though : last time I changed this one, I got a unbootable system... did it allow you to have the trackpad functionning ?

  • by SansPareil,

    SansPareil SansPareil Mar 9, 2013 9:58 AM in response to Celeri
    Level 1 (0 points)
    Mar 9, 2013 9:58 AM in response to Celeri

    Use Kext Wizard for installation, repair permissions and clear caches

     

    Trackpad: mouse and left click run, touch click and click right do'nt run

     

    the TrackPad.prefPane does not present the same functionalities in 10.6 in 10.7

    however it's the same machine..!

  • by Celeri,

    Celeri Celeri Mar 9, 2013 10:08 AM in response to SansPareil
    Level 1 (5 points)
    Mar 9, 2013 10:08 AM in response to SansPareil

    Same here : the trackpad acts just like a 1-button mouse : no right-click, no gestures whatsoever... but the PreferencePane is active though.

     

    I have not figured out how to get the Multitouch part working yet...

  • by SansPareil,

    SansPareil SansPareil Mar 12, 2013 12:37 PM in response to Celeri
    Level 1 (0 points)
    Mar 12, 2013 12:37 PM in response to Celeri

    I sought in detail...

     

    With IORegistryExplorer and 10.7 here:

     

    IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/EHC2@1A,7/AppleUSBEHCI/Ap ple Internal Keyboard / Trackpad@fa120000/Touchpad@2/AppleUSBTCButtons/IOHIDInterface/IOHIDEventDriver/ IOHIDPointing/IOHIDSystem/IOHIDStackShotUserClient

     

    IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/EHC2@1A,7/AppleUSBEHCI/Ap ple Internal Keyboard / Trackpad@fa120000/Touchpad@1/AppleUSBMultitouchDriver/IOHIDInterface/AppleUSBMu ltitouchHIDEventDriver/IOHIDSystem/IOHIDStackShotUserClient

     

    IOHIDStackShotUserClient run with 10.7 but not in IORegistryExplorer with 10.6

     

    I tried other IOHIDFamily.kext (and combinaisons) without success for instance

  • by theRealBallchalk,

    theRealBallchalk theRealBallchalk Mar 13, 2013 6:51 AM in response to SansPareil
    Level 1 (0 points)
    Mar 13, 2013 6:51 AM in response to SansPareil

    WHy is there a need to install Snow Leopard on 2011 MacBook Air?  Shouldn't the machine be running Lion and up?

  • by SansPareil,

    SansPareil SansPareil Mar 13, 2013 10:26 AM in response to theRealBallchalk
    Level 1 (0 points)
    Mar 13, 2013 10:26 AM in response to theRealBallchalk

    SL is very good system, rapid, secure.

    Also Lion doesn't support Rosetta: strategic error from apple

     

    It's a great pleasure to work with SL on MBA i7

  • by MlchaelLAX,

    MlchaelLAX MlchaelLAX Mar 13, 2013 5:13 PM in response to SansPareil
    Level 4 (2,256 points)
    Mar 13, 2013 5:13 PM in response to SansPareil

    SansPareil wrote:

     

    Also Lion doesn't support Rosetta: strategic error from apple

     

    As I wrote in another context about accessing PowerPC apps in Lion or Mt. Lion:

     

     

    Unfortunately you got caught up in the minor miracle of Rosetta.  Originally licensed by Apple when it migrated from the PowerPC CPU platform that it had used from the mid-1990's until the Intel CPU platform in 2006, Rosetta allowed Mac users to continue to use their library of PPC software transparently in emulation.

     

    However, Apple's license to continue to use this technology expired with new releases of OS X commencing with Lion (and now Mountain Lion).  While educational efforts have been made over the last 6 years, the fact is that Rosetta was SO successful that many users were caught unaware UNTIL they upgraded to Lion or Mountain Lion.

     

    Workarounds:

     

    1. If your Mac will support it, restore OS X Snow Leopard;

     

    2.  If your Mac will support it, partition your hard drive or add an external hard drive and install Snow Leopard into it and use the "dual-boot" method to choose between your PowerPC software or Lion/Mt. Lion;

     

    3.  Upgrade your software to Intel compatible versions if they are available, or find alternative software that will open your data files, modify them and save them;

     

    4.  Install Snow Leopard Server (with Rosetta) into Parallels or VMWare Fusion for concurrent use of your PowerPC application with Lion or Mt. Lion:

     

    Appleworks.jpg

                                  [click on image to enlarge]

     

    Apple has now restarted to sell Snow Leopard Server at a 95% discount over its original price: only $19.99 + sales tax & shipping; telephone orders only, call 800-MYAPPLE (800-692-7753) Apple Part Number: MC588Z/A

     

    NOTE:  Computer games with complex, 3D or fast motion graphics may not work well or at all in virtualization.

     

  • by SansPareil,

    SansPareil SansPareil Mar 14, 2013 11:00 AM in response to Celeri
    Level 1 (0 points)
    Mar 14, 2013 11:00 AM in response to Celeri

    if you launch at startup, this command:

    killall -KILL Dock

     

    the screen is correct


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