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

Firmware Update 4.1.9 includes improvements to starting up Mac OS X from the local hard disk, Firewire target disk mode, starting up from the local hard disk, network startup, and system stability. This update also adds support for additional security options which allow the Open Firmware to be password protected.

People report that this firmware more...


iMac (slot-loading CD/DVD model only).

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3 5


Current Version (4.x)


Downloads 15,838
Version Downloads 4,123
Type Utilities / System
License Updater
Date 25 Sep 2001
Platform OS Classic / PPC 32
Price Free
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