This article originally appeared in TidBITS on 2011-06-15 at 8:33 a.m.
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iMac Graphic FW Update 2.0

by Adam C. Engst

Apple has released the iMac Graphic FW Update 2.0 [1] to fix an issue that could in rare cases cause an iMac to hang during startup or while waking from sleep. The firmware update requires Mac OS X 10.6.7, but Apple doesn’t say which iMac models it applies to. Therefore, the easiest approach is to rely on Software Update to present you with the update. As always with firmware updates, be careful not to interrupt the installation process. (Free, 699 KB)