Apple has just released a small graphics firmware update “iMac Graphic FW Update 2.0”, this update is dedicated to those glitches who appearing on the 2011 iMacs running the Mac OS X 10.6.7. The graphics glitch is, a white screen appears during the startup, which cause you Mac become unresponsive, or vertical lines appear on the screen while iMac 2011 model in use.

So to resolve the graphics glitch of your iMac 2011 model, just go to Software Update and get the latest “iMac Graphics FW 2.0” on your mac and then install the update while following the onscreen instructions.

 

Go download iMac Graphic Firmware Update 2.0 here.