I just ran a scan on a friend's iMac using Scannerz and it found tons of problems on the hdd, but the SSD looks clean.
A few years ago some of the iMacs had an odd temp sensor configuration. It could be circumvented by getting a part from OWC or running a fan control program. If memory serves...
I use a product for drive testing named Scannerz with FSE. Today I went to their site to download a troubleshooting doc, and I noticed they added a new how-to section to their site. I took a look and they have an article on there about cloning a hard drive using Disk Utility under Mountain Lion...
