Apple's fancy new 27-inch iMac has an attractive screen and decently powerful hardware incorporated into a sleek body.  Unfortunately, some customers' experiences with the computer have not been so “magical” thanks to a variety of problems including cracked screens, non-booting machines, yellowed screens, and graphical issues.

Apple already tried to address its graphical woes with a firmware update in December.  However, many users in the company's support forums reported that the update did not fix their machines' poor graphics performance.  Apple has since delayed shipments of the larger iMacs, perhaps to try to buy time.

Now Apple has released a second firmware update and is hoping the second time is the charm when it comes to graphics problems.  The new update is dubbed "27-inch iMac Display Firmware Update 1.0", not to be confused with the similar-sounding previous updated named "27-inch iMac Graphics Firmware Update 1.0".  Available here, the update is only 294 KB, and is available for any Apple operating system Mac OS X 10.6.2 or later (all the new iMacs ship with Snow Leopard, so its unlikely you'd find one with something else).

Apple has apologized for the shipping delays, saying that they were caused by the model being such a "huge hit".  The model was reportedly the best selling single desktop model of Q4 2009 (though PCs and PC brands of course outnumbered it overall).  The problems affecting a handful of the new computer's buyers have apparently done relatively little to harm the model's sales.