The G4 Cube Firmware Update 4.1.9 will run only on G4 Cube models running Mac OS 9.1 or later from a local hard disk. If you are using Mac OS X on your Cube, you must start up from a local Mac OS 9.1 or later writeable partition (not a CD or network disk) before following the update instructions.
What's new in this version:
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 that allow the Open Firmware to be password-protected.