atroncosom
Level 1 (0 points)

Q: Downgrade 10.8 to 10.6 on Mac Pro

hello, I tried to downgrade the company macpro as Mountain Lion works poorly with After Effects and want to go back to Snow Leopard, I've tried everything to get back to version 10.6 but I could not, it is possible equipment to a Mac store for them to do the downgrade?

Mac Pro, OS X Mountain Lion (10.8.4)

Posted on Jun 26, 2013 3:34 PM

Close
atroncosom

Q: Downgrade 10.8 to 10.6 on Mac Pro

  • All replies
  • Helpful answers

  • by Allan Eckert,

    Allan Eckert Allan Eckert Jun 26, 2013 3:36 PM in response to atroncosom
    Level 9 (53,621 points)
    Desktops
    Jun 26, 2013 3:36 PM in response to atroncosom

    If the Mac had Mountain Lion installed on it originally, it will probably be a losing battle your attempt to downgrade the OS.

     

    Allan

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Jun 26, 2013 5:31 PM in response to Allan Eckert
    Level 9 (60,931 points)
    Desktops
    Jun 26, 2013 5:31 PM in response to Allan Eckert

    If you erase the drive, or use a new drive, you can install 10.6.5 on any Mac Pro.

     

    However, the last "Full Retail" DVD contains 10.6.3, and it will not boot the latest Mac Pros.

     

    You can do this with a Full Retail DVD, but it requires another Mac that can run 10.6 and boot from the "Full Retail" DVD, and yes it does require a "full retail" DVD because the ones packed in the boxes with new Macs are model-specific.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Jun 26, 2013 5:34 PM in response to Grant Bennet-Alder
    Level 9 (60,931 points)
    Desktops
    Jun 26, 2013 5:34 PM in response to Grant Bennet-Alder
    Mac Pro

    Date introduced

    Original Mac OS X included
    (see Tips 1 and 3)

    Later Mac OS X included
    (see Tip 1)

    Mac OS X Build(s)
    (see Tip 2)

    Mac Pro (Mid 2012)Jun 201210.7.310.8, 10.8.311D2001, 12A269, 12D78
    Mac Pro (Mid 2010)Aug 201010.6.410.7, 10.7.2, 10.7.310F2521, 10F2554, 11A511a, 11C74, 11D2001
    Mac Pro with Mac OS X Server (Mid 2010)Aug 201010.6.410.7, 10.7.2, 10.7.3 (Server)10F2522, 11A511a, 11C74, 11D2001 (Server)
    Mac Pro (Early 2009)Mar 200910.5.610.69G3553, 10A432
    Mac Pro (Early 2008)

    Jan 2008

    10.5.1

    10.5.2, 10.5.4

    		9B2117, 9C2031, 9E25
    Mac Pro

    Aug 2006

    10.4.7

    10.4.8, 10.4.9, 10.4.10, 10.5

    		8K1079, 8N1430, 8N1250, 8K1124, 8P4037, 8R3032, 8R3041, 9A581, 9A3129

     

     

    ** but the Hardware of the Mid 2012 model is essentially unchanged from the 2010 model, except for processor speed.

  • by The hatter,

    The hatter The hatter Jun 27, 2013 5:06 AM in response to atroncosom
    Level 9 (60,935 points)
    Jun 27, 2013 5:06 AM in response to atroncosom

    IF you lack the OEM DVD, those can be ordered from Apple for a small fee and the serial number off the machine so that you get the OEM 10.6.4.+ special build.

     

    ML requires all software and drivers be "PowerPC-less" as there is no underlying support for their code thru Rosetta. Roaringapps.com has a chart/table of what versions work.

     

    Yes lots of people (and threads) and no technical reason not to go down and back to SL 10.6.5/10.6.8.

     

    You stil have a "5,1" and no change to firmware to block running Snow Leopard.

  • by atroncosom,

    atroncosom atroncosom Jun 27, 2013 6:51 AM in response to atroncosom
    Level 1 (0 points)
    Jun 27, 2013 6:51 AM in response to atroncosom

    Thanks for your answers.

    The Mac Pro was bought in 2010/2011 and were coming pre-installed Snow Leopard. These teams update to Mountain Lion to test the new OS but now we do not get downgrande, I tried with the OS on usb, dvd, completely erasing the hdd, etc, I can not.

    If I use the OS SL 10.6.8 I serve?, Since probre with 10.6.7 and I worked, I could not boot the installer.

  • by The hatter,

    The hatter The hatter Jun 27, 2013 9:11 AM in response to atroncosom
    Level 9 (60,935 points)
    Jun 27, 2013 9:11 AM in response to atroncosom

    You got the original DVD ? All you need not sure what you used or why or if you know understand how

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Jun 27, 2013 9:32 AM in response to atroncosom
    Level 9 (60,931 points)
    Desktops
    Jun 27, 2013 9:32 AM in response to atroncosom

    You CAN install 10.6 on any Mac Pro, but it requires specific DVDs and may require an additional Mac to act as intermediary.

     

    It is not straightforward, and requires complete attention to the details as stated above.

     

    Anything less will result in failure.

  • by atroncosom,

    atroncosom atroncosom Jun 27, 2013 9:41 AM in response to atroncosom
    Level 1 (0 points)
    Jun 27, 2013 9:41 AM in response to atroncosom

    DVD 10.6.3 I have the original, but the Mac Pro does not recognize it, but in other machines Imac and install without problems, the Mac Pro where I can not install it, Would it be that the MacPro firmware blocks the installation of SL?

  • by The hatter,

    The hatter The hatter Jun 27, 2013 9:45 AM in response to atroncosom
    Level 9 (60,935 points)
    Jun 27, 2013 9:45 AM in response to atroncosom

    As said 10.6.3 cannot work. Might with older gpu. OEM cannot be used from or on a different Mac model.

  • by atroncosom,

    atroncosom atroncosom Jun 27, 2013 10:04 AM in response to atroncosom
    Level 1 (0 points)
    Jun 27, 2013 10:04 AM in response to atroncosom

    And if I buy 10.6.8 serve me back to SL?, Because if it does not help, do not want to spend money. The Mac Pro were purchased between 2010 and 2011.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Jun 27, 2013 10:18 AM in response to atroncosom
    Level 9 (60,931 points)
    Desktops
    Jun 27, 2013 10:18 AM in response to atroncosom

    And if I buy 10.6.8

    You cannot buy 10.6.8 in any form.

     

    The "Full Retail" 10.6.3 DVD will not boot or install directly on your 2010 or later Mac Pro.

     

    You can only:

     

    a) Use the 10.6.4 custom Mac-Pro-specific DVD that shipped in the box with the computer (if it did ship with a version of 10.6 and not with10.7) OR

     

    b) Use a slightly older Mac, Install 10.6 from a "Full Retail" DVD (that contains drivers for every Model Mac), update to 10.6.8, and clone to the Mac Pro.

  • by The hatter,

    The hatter The hatter Jun 27, 2013 10:34 AM in response to atroncosom
    Level 9 (60,935 points)
    Jun 27, 2013 10:34 AM in response to atroncosom

    IF YOU LOST OR NEED REPLACEMENT OEM DVD disc 10.6.4 ~$20 from Apple.

    How many times how many ways do we have to say spell it out.