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The iMac Firmware Update 4.1.9 will only run on iMac G3 computers with slot-loading CD or DVD drives running Mac OS 9.1 or 9.2 from a local drive. If you are using Mac OS X you must boot from a local Mac OS 9.1 or 9.2 writeable partition (not a CD, or network disk) prior to following the update instructions.
Firmware Update 4.1.9 is mandatory if you want to run Mac OS X 10.4 Tiger on your iMac G3 and it also includes improvements to starting up Mac OS X from the local hard disk, Firewire target disk mode, network startup, and system stability. This update also adds support for additional security options which allow the Open Firmware to be password protected.
Note: After you install this update, the parameter RAM (PRAM) is reset. This may reset some of your control panels to default settings. See Mac Help, available in the Help menu, for more information on changing your control panel settings.
Note: If a message says your firmware is up-to-date with version 4.1.9 of the iMac Firmware Updater, or that this version of the iMac Firmware Updater will not run on this computer, then you do not need this update. If a message says you need to install Mac OS 9.1, the firmware updater will not run until you install Mac OS 9.1 or 9.2.
Please read all the instructions before you begin:
A status bar shows the progress of the update. When a message says your computer's firmware has been successfully updated to version 4.1.9, you are finished.
Note: If a message says the update was not completed successfully, review the instructions and begin the update process again.
iMac_FWUpdate_4-1-9.smi.bin (1.24 MiB / 1.3 MB)
iMac G3 firmware update 4.1.9 / International English / Binary encoded, use Stuffit Expander
FU-iMac_FWUpdate_4-1-9.smi.bin (1.24 MiB / 1.3 MB)
iMac G3 firmware update 4.1.9 / Français Universel / Binary encoded, use Stuffit Expander
Mac OS 9.1 - Mac OS 9.2.2
Important: This firmware update only works with an iMac G3 (1998 to 2002).