"Just Works" NOT!

Discussion in 'iMac' started by p1kef1sh, Jun 10, 2010.

  1. p1kef1sh macrumors newbie

    Joined:
    Jun 2, 2010
    #1
    About 10 days ago I attempted to upgrade my nearly 4 year old G5 Intel from Leopard to Snow Leopard. About a third of the way through I got an error message that said that the install disk was dirty and should be cleaned. I cleaned it several times with a spectacle cloth before going back to the store and getting a replacement. This gave the same error. Worse still, the computer would no longer boot up Leopard, I simply got the grey screen with Apple logo and spinning wheel. I tried to restore from Time Machine - same problem. I came here and received some help and the computer booted and ran fine for a couple of days before hanging again. Sometimes I can get to the point where I register an account, but usually I get variations of grey, blue or black screens.

    I have done innumerable clean installs from Tiger thru Snow Leopard and Time Machine restores and they all hang and give me an error message:

    INVALID NODE STRUCTURE

    Yet when I erase the HD I run verify and it says that it's fine. I am now at my wits end - not least because I'm not sure that there's actually too much wrong with the hardware, it's just that I don't know the buttons to press!

    Any help will be very much appreciated. My Applecare has expired so I can't call them. Having just bought my Daughter a Macbook Pro 15" (hence I can send this message) I'd like to fix the iMac if possible and save up my pennies.
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    You cannot install Snow Leopard on a PPC Mac. What is a "G5 Intel" anyways? Is it a G5 or an Intel iMac?
     
  3. nj-mac-user macrumors 6502

    nj-mac-user

    Joined:
    Jun 1, 2009
    Location:
    New Jersey
    #3
    Lol that's funny
     
  4. old-wiz macrumors G3

    Joined:
    Mar 26, 2008
    Location:
    West Suburban Boston Ma
    #4
    It could be lots of things; a DVD drive going bad and causing the install to crap out, something on the logic board being erratic, or a disk going funny.
     
  5. Rodus macrumors 6502a

    Rodus

    Joined:
    Oct 25, 2008
    Location:
    Midlands, UK
    #5
    The one and only simple problem you have is that a G5 cannot run Snow Leopard. If you do actually have an Intel MAc then it sounds like the HD could be shot, the OS may report it is OK but this can be wrong.
     
  6. rdowns macrumors Penryn

    rdowns

    Joined:
    Jul 11, 2003
    #6
    Invalid node structure is a pretty serious hard drove problem. Disk utility can't fix it. Something like Disk Warrior might. A new hard drive would solve it too.
     
  7. Alvi macrumors 65816

    Alvi

    Joined:
    Oct 31, 2008
    Location:
    Mars
    #7
    maybe he means Mac Pro, i know many people that call the Mac Pro G5
     
  8. p1kef1sh thread starter macrumors newbie

    Joined:
    Jun 2, 2010
    #8
    My mistake. I have an Intel iMac (white). I have just done a restore from December 09 and all seems to be well. But only time will tell how long it will last? Thanks for the advice so far.
     
  9. steve2112 macrumors 68040

    steve2112

    Joined:
    Feb 20, 2009
    Location:
    East of Lyra, Northwest of Pegasus
    #9
    The G5 Intel was released at the same time as the Powerbook G5. Don't you remember? :)

    Edit: Oops, forgot to post actual tips.

    Anyway, it sounds like the hard drive is dying. I ran into this with my old Mini. I didn't notice any problems with it until after I bought my new Mini. I transferred everything to the new machine, and tried to go back and wipe the hard drive on the old Mini before selling. Everything went fine, and the OS appeared to re-install, but it kept hanging up. After running Disk Utility and some other apps on it, I found the hard drive had died. I had the same Invalid Node error, along with some other errors. It is most likely the hard drive. I dunno, maybe all the writing to the drive during the install finally killed it.
     
  10. Plutonius macrumors 603

    Plutonius

    Joined:
    Feb 22, 2003
    Location:
    New Hampshire
    #10
    Sounds like you should still get a replacement drive as soon as possible.
     
  11. p1kef1sh thread starter macrumors newbie

    Joined:
    Jun 2, 2010
    #11
    Thank Steve and Plutonius. It's hanging in there right now but I think that you're right. A new HD is what is needed. Thanks for your advice and thanks for the moral support Steve.
     

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