4 Replies Latest reply: Feb 29, 2012 1:16 PM by rccharles
McHammer79 Level 1 (10 points)

Can i update my imac g3 to leopard from mac os 8.9?

iMac, Mac OS 8.6 or Earlier
  • MGW Level 7 (27,020 points)

    No, Leopard requires an 867 MHz  procerssor, the highest you can go is Panther.







  • Niel Level 10 (293,660 points)

    An iMac G3 can go to Tiger 10.4.11.



  • MGW Level 7 (27,020 points)

    Right, just not any further.







  • rccharles Level 5 (7,090 points)

    What is the highest release of mac OS X on an iMac G3 depends on the model.


    The slot loading 400mhz and above can take Tiger 10.4.11.


    The tray loading and the slot loading 350 can take panther. 


    People have shoehorned Tiger on the earllier machines with expostfacto or by other means.


    Note: Tiger comes on DVD.  CD was a special order.


    You could buy an external DVD drive. It needs to be firewire and bootable by Mac OS. If you have another PPC with firewire, you could try target Disk mode and installed tiger that way.


    You need to figure out the level of your firmware before installing 10.2 or greater. ( The PC name for firmware is BIOS. ) Installing 10.2 with a down level firmware will most likely make your iMac unusable and difficult to fix.


    What is firmware?

    The firmware software receives control when you poweron your machine.  It does some hardware testing and some hardware configuration then passes control to your version of Mac OS.   It reside on a PROM ( program read only memory ) chip on the logic board.


    Figuring out what level of firmware you have?

    1) Mac OS 9.x or 8.x, you need to use the Apple System Profiler.

    Apple -> Apple System Profiler


    2) Mac OS X, use the System Profiler.

    Apple -> About This Mac

    click on the More Info... tab

    click on Hardware

    read the Boot ROM Version


    3) Open Firmware, boot into Open Firmware.

    Power on your iMac while holding down command+option+o+f

    The first output line contains the firmware level. Mine reads:

    Apple PowerMac4,1 4.1.9f1 BootRom built on 09/14/01 at 13.18.04

    Copyright 1994-2001 Apple Computer Inc.


    On my machine, I have 4.1.9f1.


    What firmware do you need?



    For a slot loading iMac, this article indicates that you need to be running 9.1 or later version of Mac OS Classic.


    "The iMac Firmware Update 4.1.9 will only run on iMac computers with lot-loading CD or DVD drives running Mac OS 9.1 or later from a local drive. If you are using Mac OS X you must boot from a local Mac OS 9.1 or later writeable partition (not a CD, or network disk) prior to following the update instructions."


    You can download the Mac OS 9 updates from the Apple site.


    For tiger, you need 256meg of memory.  A slot loader will take 1gig of memory.


    You may need to get more memory.

    get the 512meg card(s)




    Mac OS X 10.4: System requirements




    There is no need to partition. You can save hard drive space by doing a custom install. Leave out the print drivers you do not need and the languages you do not need. By customizing, you can trim Tiger down to about three gig.




    outoforderorder explains how...

    By the way, here it is how you find the terminal application.

    Macintosh-HD -> Applications -> Utilities -> Terminal


    From: san francisco,ca

    Registered: Apr 27, 2007


    Re: Do the widgets drain system resources and power?

    Posted: Apr 28, 2007 2:51 PM


    I tend to think dashboard is neat, but not neccesary for my everyday workflow.


    it is possible to enable and disable it as needed,

    by entering the following commands into the terminal:


    -- To turn Dashboard off:

    defaults write com.apple.dashboard mcx-disabled -boolean YES


    -- To turn Dashboard on:

    defaults write com.apple.dashboard mcx-disabled -boolean NO


    -- You have to restart the Dock after making either change for it to take effect:

    killall Dock


    Bye Bye Dashbaord



    Disable Spotlight, Bonjour and Dashboard: