About 27-inch iMac Graphics Firmware Update 1.0 Updates the graphics firmware on ATI Radeon HD 4670 and 4850 graphics cards to address issues that may cause image corruption or display flickering.
Source:27-inch iMac Graphics Firmware Update 1.0
About 27-inch iMac Graphics Firmware Update 1.0 Updates the graphics firmware on ATI Radeon HD 4670 and 4850 graphics cards to address issues that may cause image corruption or display flickering.
Source:
