I know this is my first post i just registered because i have a giant problem my doc disappeared on my old iMac i got it in Christmas of 09-10. I ran into a problem with it my dock is totally gone and i know its not hidden because when i spotlight it and try and switch it from bottom to right it doesn't respond, my computer doesnt let m login,logout or shut down properly i have to use the power button. and because of the dock disappearing i cant download anything.