Apple released a firmware update on Dec. 21, in response to complaints that some of its new 27-inch iMacs were arriving with flickering screens.
– Apple released a
firmware update on Dec. 21, in response to complaints that the displays on
some of its 27-inch iMac desktops were flickering.

The update applies to graphics firmware on ATI Radeon HD 4670
and 4850 graphics cards.

Apple introduced the 27-inch iMacs on Oct. 20, offering a
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