Hello, As the title says, i have a 2010 27" iMac that has a failed hard drive. It failed around November 2012. I have been dreading replacing this and putting it off. I figure lots of you have replace a hard drive in one of these units. I just have a couple of questions. 1. How hard is it? 2. I have read a bit and once I replace the hard drive I hear the temperature sensor goes nuts and the hard drive fans spin at max RPM is this correct? 3. Should I replace it with an SSD?