posted by Apple corrects a potential problem that Power Mac G4 users may have involving Nvidia graphics cards and Apple’s own Cinema HD Display.
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The Apple Cinema HD Display is Apple’s highest-resolution monitor. The 23 inch widescreen LCD display features a native resolution of 1920 x 1200 pixels. Equipped with an Apple Display Connector (ADC), the Cinema HD Display works with a variety of Power Mac G4 models, including those equipped with graphics cards outfitted with Nvidia’s graphics hardware — which have been standard issue or options on various Power Mac models since January of 2001.
Apple notes that Power Mac G4s equipped with graphics cards that use the Nvidia GeForce2 MX, GeForce2 MX TwinView, GeForce3, or GeForce4 MX chips require the firmware update to support the high resolution of the Apple Cinema HD Display when used in conjunction with Mac OS X 10.2 (Jaguar).
Apple said that users of such systems who continue to work with Mac OS 9.2.2 or earlier versions of Mac OS X do not have this particular issue — this update is only required if you’ve put Jaguar on your system.