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Apple today released iMac Graphic FW Update 3.0, addressing an issue that could cause hanging and freezing on iMac models.
About iMac Graphic FW Update 3.0
This firmware update fixes a graphics issue that may cause an iMac to hang under certain conditions.
The download weighs in at 481 KB and requires OS X Lion. Apple does not specify on the download page which iMac models require the update, so iMac users may want to run Software Update to see if it is offered for their specific machines.
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Top Rated Comments
(View all)Welcome to the world of Apple. Apple usually always ignores all machines that are not the current models. If they release updates for older hardware, then it's usually an accident and not intentional.
No... Apple has actually been known to keep pushing updates for old models for quite a few years. Many older macs can use Lion Internet Recovery for example, which required a firmware update.
https://forums.macrumors.com/showthread.php?t=1218175
The ROM file included in both is the same, but the distribution was previously aimed at iMacs with ROM version 113-C2950K-193, but now is aimed at ROM version 113-C2950K-178. Other requirements remain the same.
Both updates seem to be for a Mid 2011 21.5" or Late 2011 21.5" iMac with Radeon 6750M running at least 10.7.0
After the update, ROM version should be "113-C2950K-212"
Although i have to admit that Snow Leopard Graphics update was one heck of an update for my 2009 i7 machine, my framerates sometimes doubled when it came to OpenGL graphics. So they don't totally ignore ALL old machines.
And in some cases, why "fix" something that's not broken?
Maybe it's for nobody?