This update is for 20-inch and 24-inch aluminum iMac computers with the ATI Radeon HD 2600 Pro graphics running Mac OS X 10.4.10 with iMac Software Update 1.2.1 or Leopard with iMac Software Update 1.3.
It updates the graphics firmware on the ATI Radeon HD 2600 Pro to improve system stability.
System Requirements
Mac OS X 10.4.10 with
iMac Software Update 1.2.1
Mac OS X 10.5 with
iMac Software Update 1.3
iMac (Mid 2007)