Summary: install Mountain Lion on unsupported Mac - working as of 2.2017

Discussion in 'OS X Mountain Lion (10.8)' started by Luminary Crush, Feb 8, 2017.

  1. Luminary Crush macrumors newbie

    Luminary Crush

    Joined:
    Feb 1, 2017
    Location:
    San Pedro, California, USA
    #1
    This procedure works perfectly as of this date - I've upgraded two MacBook 3,1 laptops this way. Use MLPostFactor, not MacPostFactor, which no longer works for Mountain Lion (as of 2.0.x).

    First, download MLPostFactor 0.3:

    http://iusethis.luo.ma/mlpostfactor/MLPostFactorV0.3.zip

    Then, follow the instructions here:




    For your convenience, here are the contents of the plist files for the SystemVersion.plist updates referenced in the video:

    10.8.4:
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
    <key>ProductBuildVersion</key>
    <string>12E55</string>
    <key>ProductCopyright</key>
    <string>1983-2013 Apple Inc.</string>
    <key>ProductName</key>
    <string>Mac OS X</string>
    <key>ProductUserVisibleVersion</key>
    <string>10.8.4</string>
    <key>ProductVersion</key>
    <string>10.8.4</string>
    </dict>
    </plist>

    10.8.5:
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
    <key>ProductBuildVersion</key>
    <string>12F45</string>
    <key>ProductCopyright</key>
    <string>1983-2013 Apple Inc.</string>
    <key>ProductName</key>
    <string>Mac OS X</string>
    <key>ProductUserVisibleVersion</key>
    <string>10.8.5</string>
    <key>ProductVersion</key>
    <string>10.8.5</string>
    </dict>
    </plist>
     
  2. TranquilityYT macrumors newbie

    Joined:
    Feb 12, 2017
    #2
    Can you use MacPostFactor afterwards on 10.8.4? I want to get all the way up to 10.11.
     
  3. Luminary Crush thread starter macrumors newbie

    Luminary Crush

    Joined:
    Feb 1, 2017
    Location:
    San Pedro, California, USA
    #3
    I don't know.. I'm not (yet?) interested in that path because you lose screen control, sleep, etc etc. Maybe if someone get those features working in the older Macs, but it seems like most people have given up on it.
     
  4. TranquilityYT macrumors newbie

    Joined:
    Feb 12, 2017
    #4
    So how exactly does one go about alleviating error code 1?
     
  5. Luminary Crush thread starter macrumors newbie

    Luminary Crush

    Joined:
    Feb 1, 2017
    Location:
    San Pedro, California, USA
    #5
    I have no idea what you are referring to. I am just an end-user who thought it would be nice to have a summary of how to get your old Macbook up to Mountain Lion as it's buried in threads taking hours to read. I've upgraded two A1181s thus far according to the above and they work really well.
     
  6. TMRJIJ macrumors 68030

    TMRJIJ

    Joined:
    Dec 12, 2011
    Location:
    South Carolina, United States
    #6
    Something is wrong with your copy of the Mountain Lion Installer app (or it may be something to do with the language/region set on your Mac).
     
  7. donjames macrumors member

    Joined:
    Feb 20, 2015
    Location:
    Henderson, Texas
    #7
    This doesn't work on my Macpro1,1. It doesn't make a good boot usb. The MLPostFactor runs to completion, but the usb drive it makes is not bootable.

    Just thought someone would want to know.

    Regards,

    Don James
     
  8. Macfield macrumors newbie

    Macfield

    Joined:
    Feb 24, 2017
    #8
    I just did this a few days ago before seeing this post.

    It worked for me, however it seems to me like I can't use ML unless the hard drive I used with the ML partition on it is connected.

    It installed perfect, but I have to select it from the boot screen to use it. If I restart my computer without the external connected it just boots into Lion and all my things are still there.

    Something I missed?
     
  9. Saturn TC, Apr 18, 2017
    Last edited: Apr 18, 2017

    Saturn TC macrumors newbie

    Joined:
    Apr 18, 2017
    #9
    I have a late 2006 iMac core 2 duo 17inch. I would like to install Mountain Lion. Which version of Mountain Lion 10.8.1- 10.8.5, would work best on this machine ? Tnx TC
     
  10. Tardegard macrumors newbie

    Tardegard

    Joined:
    Nov 5, 2016
    #10
    I cannot find the 10.8.4 4,46GB version. I have a 10.8.5, is it ok?
     
  11. catzilla macrumors 6502

    catzilla

    Joined:
    Dec 15, 2013
    Location:
    Rhode Island
    #11
    I Have no idea how to determine which installer I have, but it is 4.47GB. I used this process to install it on an Xserve 1,1 without any problems.
     

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