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  1. #1


    Member Since
    Dec 22, 2010
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    Sheffield
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    Apple Mac Pro Quad Core 2.66 GHZ
    Downgrading from Osx 10.6 to 10.5
    Hi guys,

    I'm new to this forum and was wondering if it's possible to downgrade my mac pro quad core 2.66ghz desktop from 10.6 to 10.5? It's to do with audio software compatibility...

    Also the version of 10.5 I have access to is actually a 10.5.7 CD that came with my friends macbook pro laptop - can that be installed to a desktop mac pro or just a laptop?

    Any help on the process once i've backed up everything would be much appreciated,

    Abdullah

  2. #2

    mdfuller's Avatar
    Member Since
    Nov 01, 2007
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    Don't think you can use his disc. You would need a disc for your model or a standard OS disc. Have you contacted the vendor of the audio software and told them to get with the times?

  3. #3


    Member Since
    Dec 22, 2010
    Location
    Sheffield
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    Specs:
    Apple Mac Pro Quad Core 2.66 GHZ
    Unfortunately the mac only came with a version of snow leopard 10.6... Really annoying!

    Ok well if I get a copy of the standard osx 10.5 disc is it just a straightforward wipe/install or is there a certain procedure I need to do as I'm downgrading?

    Thanks

  4. #4

    mdfuller's Avatar
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    I would do a clean install.

  5. #5

    harryb2448's Avatar
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    Imac 27" Retina 5K, 512GB flash memory, 3.3GHz, 16GB memory, macOS Sierra beta.
    Make sure you purchase the black full retail install Leopard DVD and not some silver/grey model specific disc such as your friend's which you should not use as that is illegal apart from not working.

    Leopard will cost $100-150 and you will need to do a clean install, format the drive and losing anything on the drive. If the machine came with Snow Leopard discs when new, you cannot go backwards.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  6. #6

    cwa107's Avatar
    Member Since
    Dec 20, 2006
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    Quote Originally Posted by darkstorm86 View Post
    Unfortunately the mac only came with a version of snow leopard 10.6... Really annoying!
    Do you know if it shipped from the factory with 10.6? If so, you likely won't be able to downgrade as older versions are unlikely to have the needed drivers to support your hardware.

    I really would advise against downgrading - pursue other avenues such as getting compatible software first.
    Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!

    https://youtu.be/KHZ8ek-6ccc

  7. #7


    Member Since
    Jan 22, 2010
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    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    Seems to me that the OP is going about this bass-ackwards. Upgrade the audio software, not the OS.

  8. #8

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
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    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    I've not seen any successful stories of anyone downgrading to 10.5 on a system that shipped with 10.6.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  9. #9


    Member Since
    Dec 22, 2010
    Location
    Sheffield
    Posts
    3
    Specs:
    Apple Mac Pro Quad Core 2.66 GHZ
    Ok thanks for the advice people, I've already upgraded the audio software to the newest version and tried all the steps advised to me by the allen and heath tech team but i'm still getting the same problem. So I thought it could be snow leopard because i've seen a lot of issues people have been getting on other forums.

    We don't have internet at our studio until next week so I will upgrade the OS to the newest version and fingers crossed that should sort it out. If anyone knows of any mac updates on snow leopard I should avoid for music tech issues let me know... Happy holidays!

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