Im a little worried about my iMac. It takes about 60 seconds after I press the button to EVEN SHOW THE WHITE SCREEN. It just stays black. When it first started happening I was freaking out thinking my computer was fudged. I recently added 16 GB of RAM to the iMac, but it ran fine with that for a while. Once on, this thing is damn fast with 20GB of RAM total, but I just don't know why the boot time is so slow..... It also just shuts off...randomly. I don't know if my cats are playing with the surge protector, or if this RAM is faulty, cause I know RAM can cause comps to shut down sometimes... Anyone else had this issue?