Download Apple iMac Firmware 4.1 for Mac from our software library for free. The most recent setup file that can be downloaded is 1.2 MB in size. This Mac download was scanned by our built-in antivirus and was rated as safe. The application lies within System Tools, more precisely General.
From the developer:
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.
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