About iMac Graphics Firmware Update 1.0

This update is for 20-inch and 24-inch aluminum iMac computers with the ATI Radeon HD 2600 PRO graphics processor, running Mac OS X 10.4.10 or later with iMac Software Update 1.2.1 for Tiger, or Mac OS X 10.5 with iMac Software Update 1.3 for Leopard. Note: If you are running Mac OS X 10.5.1, iMac Software Update 1.3 is included.