Previous 1 2 Next 15 Replies Latest reply: Jul 22, 2012 3:47 AM by Neville Hillyer
machara Level 1 (0 points)

I want to upgrade the OS but not sure if I can go straight to the latest OS or if I need to install another one first?

  • seventy one Level 6 (13,262 points)

    10.6.3 would be your first target, then update (Free) to 10.6.8.   But you don't say what model you have.


    Check out via Apple menu > About this Mac > More info.  Post back with model details but not serial number.

  • machara Level 1 (0 points)

    Thanks. Its an iMac with a 2.4 Ghz intel core 2 Duo which I bought in 2008.


    Hardware Overview:


      Model Name:          iMac

      Model Identifier:          iMac8,1

      Processor Name:          Intel Core 2 Duo

      Processor Speed:          2.4 GHz

      Number Of Processors:          1

      Total Number Of Cores:          2

      L2 Cache:          6 MB

      Memory:          1 GB

      Bus Speed:          1.07 GHz

      Boot ROM Version:          IM81.00C1.B00

      SMC Version (system):          1.29f1

  • machara Level 1 (0 points)

    Also, when I install the new OS will all applications have to be reinstalled and will all the data on the HD be lost?

  • mende1 Level 10 (92,201 points)

    You can install Snow Leopard, Lion or Mountain Lion.


    Mountain Lion will be released next week, so upgrade to Snow Leopard and buy it when it is launched. You will keep everything if you upgrade (do a backup before this)

  • stedman1 Level 9 (69,749 points)

    Info deleted after previous post was deleted and my warning was not required.

  • seventy one Level 6 (13,262 points)

    No, the data should not be lost.   You will need at least 1GB more of memory (3GB if you go further than 10.6.3   These are the minimum specs you will require.)



    You can buy Snow Leopard from the Mac App store (and then you'll have access to the App store itself)  Hooray.

  • mende1 Level 10 (92,201 points)


  • machara Level 1 (0 points)

    Oh I'll be backing up all the data before I upgrade the OS

  • stedman1 Level 9 (69,749 points)

    , no apology required.



  • machara Level 1 (0 points)

    Thanks for the info. So first I need to upgrade to Snow Leopard and then I can jump to Mountain Lion? Its many years since I upgrade the memory in a pc. How easy is it to install new memory in the iMac? Didn't even think about memory being an issue :-(

  • seventy one Level 6 (13,262 points)

    Yes, you've got it in principle.   Just a personal opinion though.   Lion has not been surrounded with plaudits and hopefully, Mountain Lion will incorporate all the best parts.


    Just the same, the cautious side of me suggests you sort out Snow leopard first (don't forget to update with the combpo updater) then wait for three months and let Mountain Lion bed down.   You'll have enough fun with Snow Leopard to keep you occupied and it is an excellent OS.


    In respect of memory, if you are UK based, Crucial .com is a good source and if you phone them they will talk to you about your needs.   They supply video and pictorial guidance to fitting and I have to say, it is not difficult.   I did it and I'm no techno man.


    Good luck.

  • machara Level 1 (0 points)

    thanks seventy one. I'm in Australia so it'd be a long call to the UK. I just checked to see if the Mac has a 64 bit kernel and its only a 32 bit. Saw in another post that a min of 64 is required for mountain lion so not sure if I can upgrade that far. Thanks for the tip. I'll give snow leopard a try first.



  • seventy one Level 6 (13,262 points)

    Hello again,


    And thank you for the stars.   Seems just a little odd not to have 64 bit.   Where did you check that?


    Have you looked at Apple menu >  About this mac > More info > Systems profile > Applications.   The list it produces tells you if you have any 64 bit Apps.   If you have ... well.


    Great Aussi supporters here in my home ... except for the cricket.

  • machara Level 1 (0 points)

    Another post mentioned this:....


    Your model must have a 64-bit EFI boot ROM. See OS X v10.6- Macs that use the 64-bit kernel


    An easy way to tell if you are running a 64-bit kernel is to use the uname command-line program. Open the Terminal in the Utilities folder and enter the command line:


              $ uname -a


    Press RETURN.


    The "x86_64" in the excerpt below means that you are running a 64-bit kernel. If the output showed "i386" instead, that would mean a 32-bit kernel.

    ------------------------------------------------------------------------------- -----------------------------------------------------------------------------

    I did the above and it returned......


    9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 i386


    but like you say I have no issues running applications


    as for cricket....I only follow rugby

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