I just received all my house hold goods while moving overseas. So, basically my iMac has been turned off since January and who knows what happens during transportation. My 2009 iMac 27" seems to be working fine, except it doesn't seem to boot up all the way. It turns on, I can open apps and everything except folders. When I click to open a folder it says "The application "Finder" is not open anymore." I know my Magic Mouse was left on the whole time, so now I'm using the Logitech Ultra Thin mouse for mac. But, when I started my iMac it was looking for the mouse and that's when I connected my Logitech mouse. Don't know if that could be the issue.