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iMac G5 won't allow upgrade from Tiger

196 Views 5 Replies Latest reply: Feb 10, 2013 6:15 PM by den.thed RSS
Brion800 Calculating status...
Currently Being Moderated
Feb 10, 2013 8:39 AM



I bought a 2007 Intel iMac from Ebay - a 20" white one with built-in iSight camera.


It had Tiger installed, and seemed to be working ok.


I upgraded to Snow Leopard, which as supplied with it, and which the previous owner claimed to have installed successfully, but for some reason had done an erase and install back to Tiger.


Once I installed Snow Leopard, the iMac begar to freeze and shut down suddenly and act crazy.


I tried Leopard, and it still didnt seem happy.


I finally did an erase and install with the original system discs (Tiger) which took 3 attempts, as the iMac kept freezing between disc one and disc two. Once finally done, the iMac seemed to function smoothly.


Does this sound like a dodgey hard drive? Could it be how the iMac is reading the discs? During the installing I kept getting lines of pixels across the screen.


Is this the danger of paying £255 for an old iMac on Ebay.

  • Klaus1 Level 8 Level 8 (43,365 points)
    Currently Being Moderated
    Feb 10, 2013 9:01 AM (in response to Brion800)

    Start by checking if you can run Snow Leopard:


    Requirements for OS X 10.6 'Snow Leopard'



    OS 10.6 Snow Leopard is once again available for $19.99 from the Apple Store:



    and in the UK:



    but nobody knows for how long it will be available.


    When you have installed it, run Software Update to download and install the latest updates for Snow Leopard.


    To use iCloud you have to upgrade at least to Lion, but some functions are only available in Mountain Lion:



    You can also purchase the code to use to download Lion (Lion requires an Intel-based Mac with a Core 2 Duo, i3, i5, i7 or Xeon processor and 2GB of RAM, running the latest version of Snow Leopard), or you can purchase Mountain Lion from the App Store - if you can run that:


  • den.thed Level 7 Level 7 (23,325 points)
    Currently Being Moderated
    Feb 10, 2013 9:37 AM (in response to Brion800)

    First off, the last G5 iMac's were made in 2005 and all the iMac from 2006 on are Intel iMac's.


    Second, is sounds like you have either an Early or Late 2006 Intel iMac because the 2007 models had an Aluminum case and not a white one.


    Thirdly, those 2006 models only came with 512MB of 1GB or RAM which is hardly enough to run Snow Leopard and Safari at the same time. Plus to make matters worse the Early Core Duo's can only be upgraded to a maximum 2GB of RAM.


    Lastly, many of those models were known to develop lines on the display's and cooked graphic's chip's if they were used for even moderate gaming.


    Last and finally, it is on in years and most likely has both a well warn Hard Drive and Optical Drive that are going to make it unreliable at best.


    With all that said, I do have a 17" Early 2006 Core Duo with 2GB of RAM that I bought brand new. It has survived the years pretty well with regular maintenance and a Hard Drive upgrade along the way. But to be perfectly honest, the only reason I even keep it around and maintained is so that the grandkids have a computer to use at papa's house.

    iMac, Mac Mini, iPad, iPods, Mac OS X (10.6.8), (10.8.2), Safari, iTunes, iPhoto
  • Klaus1 Level 8 Level 8 (43,365 points)
    Currently Being Moderated
    Feb 10, 2013 1:48 PM (in response to Brion800)

    If he could increase the RAM to 4GB it is definitely an Intel iMac - the previous G5 model could only be increased by 2GB.

  • den.thed Level 7 Level 7 (23,325 points)
    Currently Being Moderated
    Feb 10, 2013 6:15 PM (in response to Brion800)

    Yea sounds like a Late 2006.


    Not sure thought why it won't run Snow Leopard though, mine with 2GB runs fine as long as you don't open to many App's all at the same time.


    If your upgrade it with the white Retail Snow Leopard Upgrade DVD, go straight for the > Mac OS X 10.6.8 Update Combo v1.1 and see if that doesn't make it better.


    No, I'm pretty sure that those ATI Radoen X1600 chips can not be changed or upgraded.


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