So I'm taking my 27-inch iMac into the Apple store to get its hard drive replaced soon, so was just curious if there's anything special I should do beforehand? I'm going to bring the iMac, keyboard, mouse and power cord, but I'm still looking to see if I need to bother bringing any of the install CDs or not, or if a USB backup of Snow Leopard will be enough. And trying to wipe any of my old data that might be left from the mac and windows partitions. My iMac falls under that hard drive replacement program I think, and I still have AppleCare anyway. I'm mostly sure its the hard drive that's the problem, according to disk utility at least. I also added some ram, but the Genius Bar probably won't tinker with that part, I hope. Just asking how others' experience went. Tried searching, but lots of different results came up and couldn't quite find what I was looking for. I'm hoping they'll just open up my 2010 model, replace a part and then I'll take it home and start loading up my data (everything is backed up). I really doubt they would replace the whole computer, especially with the 2012 model still in short supply and the 2010 version still has a few features I'd prefer to keep.