Apple has released a number of firmware updates for recently released Macintoshes; all of them are available for download from Apple’s
Software Downloads Web site.
Systems affected by the firmware update include: Power Mac G4 Cubes equipped with AGP graphics Power Mac G4s and Macintosh Server G4 models equipped with AGP graphics iMacs with slot-loading DVD or CD drives PowerBooks with built-in FireWire iBooks with built-in FireWire
In all cases, the systems need to be running Mac OS 9.1 in order for the firmware update to function. The new firmware updates universally incorporate improvements to: Firewire target disk mode Network booting Gigabit networking (on systems with gigabit hardware) system stability This update also adds support for additional security options which allow the Open Firmware to be password protected.
Update: Please see our related article,
Recent firmware updates: proceed with caution, for more details before proceeding with the firmware update.