Hi All, Newbie here, I've searched through the forums and couldnt find a solution. My iMac attempted to update the latest security update (10.10) on Thursday the 12th of March 2015. Upon restart I get kernal panic. This occurs very early in the boot cycle (Process 1 of exec of /sbin/launchd failed errno 2 ...) Out of all the booting options the only one that doesnt crash is the Recovery Mode. However in recovery mode it seems to be Internet Recovery only. Disk utility says there is nothing wrong with my HD. When I try to select the option to install OS X I get an error message that reads like 'You are unable to install to this drive as the drive contains a newer version of the OS" What I believe the Internet Recovery is trying to do is install the original version of the OS (Mavericks) that came with the iMac. This doesn't make sense as I had the latest version of Yosemite install on the computer. What are my options? I'd prefer not to do a clean install. Hardware tests show that there are no problems trying to reset the PRAM fails (hangs for 8hrs + at about 30%) Q2) Should I create a new partition off my main HD and attempt to install the OS to the new partition? Is that possible?