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  1. #1


    Member Since
    Jan 03, 2012
    Posts
    5
    Will my iMac G4 run OS X 10.5?
    I am new to mac and have just bought a G4, I will list the specs below. I would like to know if it will run OS X 10.5 and if there is a cheap upgrade as I own 10.4, or do I need to pay full price.

    My specs are:

    800mhz processor
    512mb ram
    60gb hdd

    Thanks.

  2. #2


    Member Since
    Dec 11, 2010
    Location
    Chicago
    Posts
    1,482
    Specs:
    late 2012 mini w/SSD
    Your Mac doesn't meet the requirements for 10.5. 10.4.11 is the highest for that Mac.

  3. #3

    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    35,404
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    As "gsahli" mentioned...technically your computer does not meet the minimum requirements for OS 10.5. Officially from Apple...you need at least an 867mhz G4 processor (you have an 800mhz).

    There is a program call "Leopard Assist"...that "fools" the OS 10.5 installer into installing 10.5 on slower computers:

    LeopardAssist

    You may not get the best OS 10.5 performance on a slower computer...but it will run.

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  4. #4


    Member Since
    Dec 10, 2011
    Posts
    2
    Will LeopardAssist work to install 10.5 on an old iBook G3 @ 900MHz? Or is that just too far out of spec to even consider? It is running 10.4.11 currently. It has been sitting in my closet and rarely gets used. (The only thing I really use it for is to maintain my old iPod Nano). I bumped up the RAM to it's max of 640MB, put in an Airport card, and have an external FireWire DVD/RW. But there is only so much you can do with older hardware...

  5. #5


    Member Since
    Dec 11, 2010
    Location
    Chicago
    Posts
    1,482
    Specs:
    late 2012 mini w/SSD
    AndiWhitts:
    You'll need to buy 10.5 - you can only use Black retail DVDs - not gray ones.

    pigoo3: Thanks. Hadn't used it so didn't know about LeopardAssist.

  6. #6

    louishen's Avatar
    Member Since
    Oct 22, 2007
    Location
    London
    Posts
    8,968
    Specs:
    Mac Mini Core i7 2012 | White 2009 MacBook 2 Ghz | 733 Mhz G4 Quicksilver
    Quote Originally Posted by Xyphus View Post
    Will LeopardAssist work to install 10.5 on an old iBook G3 @ 900MHz? Or is that just too far out of spec to even consider? It is running 10.4.11 currently. It has been sitting in my closet and rarely gets used. (The only thing I really use it for is to maintain my old iPod Nano). I bumped up the RAM to it's max of 640MB, put in an Airport card, and have an external FireWire DVD/RW. But there is only so much you can do with older hardware...
    I think that's asking too much. Even my older G4 is still running Tiger 10.4.11, but that's fine for what I want it to do
    Member of the Month September 2008 & August 2012 | Found advice useful? use the rep system

  7. #7

    JohnCL's Avatar
    Member Since
    Jan 29, 2009
    Location
    Kansas City
    Posts
    1,202
    Specs:
    -->
    Quote Originally Posted by Xyphus View Post
    Will LeopardAssist work to install 10.5 on an old iBook G3 @ 900MHz? Or is that just too far out of spec to even consider? It is running 10.4.11 currently. It has been sitting in my closet and rarely gets used. (The only thing I really use it for is to maintain my old iPod Nano). I bumped up the RAM to it's max of 640MB, put in an Airport card, and have an external FireWire DVD/RW. But there is only so much you can do with older hardware...
    Leopard however will not run on the 900 MHz iBook G3 models even though they exceed the minimum 867 MHz requirement. This is due to the lack of AltiVec in the G3 line of processors and the fact that most pre-G4 and early G4 systems do not have video hardware capable of supporting Core Image, two technologies Leopard relies upon heavily, among others.

    Source
    13" rMBP 256gb | Mac Mini | 24" ACD | 64GB Verizon iPhone 6s Plus | 128GB iPad Pro LTE | 16GB iPad mini 2 | Gen 7 Nano | Gen 4 iPod Touch | TV1 | TV3 | TV4 | Watch Sport 42mm Space Gray

  8. #8


    Member Since
    Dec 10, 2011
    Posts
    2
    I figured as much, but it was worth asking.

    I have a late 2009 MacBook which has replaced the old iBook and has been serving me well, and can run an up-to-date OS, so I'm not lacking in support. I just feel bad that the old iBook is sitting unused in the closet.

    I may try and re-purpose it as a starter computer for my mother. For browsing the web and sending/receiving email it should suit her well. Pending of course that I can actually even get her online. Being in her mid 60's and never having used a computer she is reluctant to even try.

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