You could have downloaded Apple Cube Firmware 4.1 for Mac from our software library for free. The application lies within System Tools, more precisely General.
From the developer:
The G4 Cube Firmware Update 4.1.9 will only run on G4 Cube models with AGP graphics running Mac OS 9.1 from a local drive. If you are using Mac OS X Server on your Cube, 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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