8 Replies Latest reply: Feb 15, 2011 5:52 PM by K Shaffer
Lewisewis Level 1 Level 1
hi, i have an imac G5 1.8GHz PowerPC G5 Processor 512K on-chip level 2 cache running at 1.8GHz 256MB of DDR SDRAM;supports up to 2GB 80GB Serial ATA hard drive Slot-loading SuperDrive (DVD-R/CD-RW) 17-inch (viewable) widescreen active-matrix LCD display NIVIDIA GeForce FX 5200 Ultra graphics processor with 64MB of DDR video memory Built-in 56K V.92 modem and telephone cable Built-in 10/100BASE-T Ethernet (external DSL and cable modem ready) Two FireWire 400 ports;three high-speed USB 2.0 ports;two USB 1.1 ports on keyboard Ready for Airport Extreme wireless networking.

The problem is installing 10.5, the iMac G5 is on the current os x of 10.3.9 and uses Airport Wireless Networking to connect to Sky Broadband, when i put in the disc is pops up with the install memu, so i click install then i click restert, it takes a little more time than expected to restart and after the grey screen with the apple logo has gone, it loads up a blank blue page, then a blank navy blue page, then the mouse icon appears and then it turns to the colourfull pinwheel and stays like that forever. I have tried 2 different disks and the disk drive works becuase last week i reinstalled Panther (10.3) and it installed fine, the model of the iMac G5 is from 2004.

Any help or comments would be greatfull as i have purchased 2 discs and neither of them have installed . I have done the Option key, The C key, everything it says on various blogs and posts but neither of the disks seem to work, if there is a software problem then i understand but i have checked it all and even researched it up and also watched youtube videos on how to install and the system requirements but still.... no hope. !

Anything to help, i would be so greatfull


1.8GHz PowerPC G5, Mac OS X (10.3.x), 1.8GHz PowerPC G5 Processor 512k on-chip level 2 cache running at 1.8GHz 256 of DDR SDRAM;supports up to 2GB 80GB Serial ATA hard drive 17-inch
  • Jay Bullock Level 4 Level 4
    What color are the discs you're trying to install from? You will need a black retail version of Leopard. If the disc you have is gray, that means it shipped as a restore disc with some other Mac and is specific to that model; you can't use it on your iMac.

    I know that in the US, people can still purchase Leopard by calling Apple Phone Sales. I am not sure about the UK, but you can try the Apple Phone Sales number or the Apple Care number and see if they can sell you the retail version.
  • Lewisewis Level 1 Level 1
    Hello I have the full retail version (MB021Z/A) - the disc is black with a big x on it.
  • K Shaffer Level 6 Level 6
    You probably should upgrade the RAM to more than 256MB before
    attempting to run an OS X 10.5 system in a supported computer.

    Since the iMac G5 can use significantly more, to upgrade this is
    an important part of the computer's usefulness; and also to get
    this capacity up to at least 1024MB or 2048MB is recommended.
    And perhaps with matching quality chips, to be sure it works.

    The Mac probably can't boot 10.5 with less than 512MB unless
    it could start in SafeBoot mode; with only 256MB that's not well.

    Good luck & happy computing!
  • Jay Bullock Level 4 Level 4
    Okay, re-reading your first post I see that you only have 256MB of RAM? I believe Leopard requires a minimum of 512MB. Try picking up some additional RAM--you listed the type you need, so you should be able to find an upgrade--and try with a full gig or RAM or more.
  • Lewisewis Level 1 Level 1
    Many thanks - I will buy some additional RAM and let you know the result! thanks again
  • Jay Bullock Level 4 Level 4
    Good luck. The RAM boost will be a significant improvement in your life.
  • Lewisewis Level 1 Level 1
    Hi, i have a 1GB RAM peice and put it in but the iMac doesnt read it ? i have done everything, here is a page of it....http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280582423773&ssPageName=STR K:MEWAX:IT and ive done everything right, put it in my spare slot but when i click, about this mac, it does say 1GB only 256 MB !

  • K Shaffer Level 6 Level 6
    You'd probably do better to upgrade both slots, since the computer can use
    2 - 184-pin PC-3200 (400MHz) DDR SDRAM for a total of 2048MB RAM.

    Some other G5 models prefer to have matching RAM, specifically towers.
    However since the iMac G5 of this vintage shipped with Panther and a
    single processor, it has less stringent specifications in this area.

    If the computer does not see a RAM update, you may try and see if a
    PRAM reset will help the hardware recognize new RAM in the system.

    • Resetting your Mac's PRAM and NVRAM:

    If the RAM does not match the minimum quality specs or is damaged, then
    you would have to try a different RAM chip. Ones certified to be Apple Mac
    OS X compatible will provide a better service; and you probably could buy
    these at a fairly competent computer retailer, without shipping/waiting.

    Hopefully this helps...
    Good luck & happy computing!