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Installing Snow Leopard on New Partition

353 Views 11 Replies Latest reply: Dec 11, 2012 9:51 PM by greatdesign RSS
greatdesign Level 1 Level 1 (0 points)
Currently Being Moderated
Dec 11, 2012 1:54 AM

Hi,

 

I've read a lot about installing new partitions and running different opearting systems side by side and it seemed fairly straightforward.

 

I have the lastest version of Monuntain Lion installed and created a partition for Snow Leopard to run some software that isn't so stable on Mountain Lion.

 

Creating the partition was easy - but my iMac won't read my original SL install disc to install on the new partition.

 

From what I've read this could either be due to DVD disc/player issues, or what is more likely (as I can successfuly run other discs) is that that having Mountain Lion intslled is stopping the process.

 

I read that it may be the firmware version of my Imac stopping me installing the legacy OS.

 

Can anybody shed any light on it?

 

Regards

 

Chris

iMac, OS X Mountain Lion
  • Trane Francks Level 2 Level 2 (205 points)
    Currently Being Moderated
    Dec 11, 2012 2:32 AM (in response to greatdesign)

    The question of whether you can install Snow Leopard is a matter of the minimum OS supported for the hardware. If your iMac originally shipped with Snow Leopard, then you should be able to install it and your problem is likely a disc or player issue. If you're using SL discs from a different system and your iMac originally shipped with Lion or Mountain Lion, you will not be able to install Snow Leopard on it.

  • W.M. Bravenboer Calculating status...
    Currently Being Moderated
    Dec 11, 2012 3:02 AM (in response to greatdesign)

    Last week we had something similar; two brand new iMacs, with software and plugins that don't run well on ML.

    After some googling we found finally a sort of solution, if you have the original SL disc, you cannot start the mac from it, because the only SL version the iMac will start off, is 10.6.8. The disc version is 10.6.3.

    You have to manually start the installation, so the mac will not reboot (because it will not start from the disc)

     

    This is from what I found;

     

    Pop in the Snow Leopard disk, or mount the imange, but instead of double-clicking the installer, click the Go menu and go to System/Installation/Packages  (note: there's no leading slash. You're not navigating to the System on the root drive, you're navigating to the System on the installer). Find OSInstall.mpkg and double-click. "mpkg" is a meta-package, or a package full of other packages. This is the installer that launches when you boot off the disk.

     

    Install on a clean partition, and use the Combo updater, then it should start from 10.6.8

    After some fiddling we now have two iMacs running Snow Leopard (which is still the best)

  • Trane Francks Level 2 Level 2 (205 points)
    Currently Being Moderated
    Dec 11, 2012 5:18 AM (in response to greatdesign)

    Wow. That's scary. Upgrade your OS and lose your drive.

     

    Not as cheap as it first appears.

  • W.M. Bravenboer Level 1 Level 1 (15 points)
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    Dec 11, 2012 5:24 AM (in response to Trane Francks)

    Isn't it possible to buy SL in the Apple Store and download it?

    Or else to get the installer files on a USB stick?

    I understand you can't see any DVD or CD in your drive under Mountain Lion?

  • Trane Francks Level 2 Level 2 (205 points)
    Currently Being Moderated
    Dec 11, 2012 5:27 AM (in response to W.M. Bravenboer)

    W.M. Bravenboer wrote:

     

    Isn't it possible to buy SL in the Apple Store and download it?

    Or else to get the installer files on a USB stick?

    I understand you can't see any DVD or CD in your drive under Mountain Lion?

    Unfortunately, Snow Leopard is only available in DVD format. It would be possible for the original poster to create a USB version of the discs, yes, but that entails a working drive first.

  • W.M. Bravenboer Level 1 Level 1 (15 points)
    Currently Being Moderated
    Dec 11, 2012 7:01 AM (in response to greatdesign)

    Perhaps it works through Virtualbox? It is a free virtualizer, and it can install Mac OS X, it could be possible that it sees the Disc in a virtual environment.

     

    www.virtualbox.org

  • W.M. Bravenboer Level 1 Level 1 (15 points)
    Currently Being Moderated
    Dec 11, 2012 1:02 PM (in response to greatdesign)

    Can you mount the image? Or else unpack it?

     

    Make sure you have the OS X Install DVD window active, in the finder click 'Go' and 'Go to Folder' (Shift-Apple Key G) and enter 'System/Installation/Packages'

    Then a window should come up with a lot of '.pkg' files, find the file that says 'osinstall.mpkg'

    double click this, and should start the installer, without the need to reboot...

    If you have installed SL, do not restart, but install the combo 10.6.8 update, this should work, and then you can restart the mac into SL...

     

    Hope this works!

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