This evening the Apple company released a new software update for the iMacs produced to date. The new update solves a problem with the drivers for the video cards incorporated in some of the models sold so far, but unfortunately it is not specified in the update which of the iMacs have problems. The new update is available only for Mac OS X Lion so you must have the latest version of the operating system to be able to install it and I recommend you to open Software Update and do a search.
About iMac Graphic FW Update 3.0
This firmware update fixes a graphics issue that may cause an iMac to hang under certain conditions.
Do not shut off the power on your iMac during this update. Loss of power could result in your iMac failing to start up.
If until now your iMac has had problems generated by the graphics card, then it would be ideal to install the update in the hope that you will solve everything. If you don't have OS X Lion installed, it might be a good idea to update if the problems you are experiencing require such a step.
