My hard drive has been wonky lately so I decided to swap it out. I have an early 2006 iMac, details here: http://support.apple.com/kb/SP35 The drive I used was a Western Digital WD10EADS 1 TB drive. Everything went well in the hardware installation. Upon booting the computer from the snow leopard install disc, the 'Choose disk to install Mac OS X on' box is empty. The hard drive also doesn't show up in disk utility. When I go to system profiler the Serial ATA category gives me a couple lines of info like Intel and 1.5 gigabits, but I think that's not the actual hard drive but the embedded information (am I right?). So, what can I do? I'm almost positive the wires are fine, but I'll tear it back open if I need to. Is this hard drive compatible with this iMac? Can it handle a 1 TB hard drive? If it couldn't, would it still show up in disk utility but just with less capacity? Right now I'm burning an Ubuntu disc and I'm going to see if I can boot to Ubuntu Live. That will at least tell me if it's software or hardware. Any help is appreciated!