(Using a 2010 27" iMac with Quad-Core i5 Processor - Mac OS X 10.6) Got a new iMac for Christmas! But unfortunately, since yesterday, it turned suddenly slow. Last night, when I turned it on seemed to go into Safe Boot (after 1-2 min wait with the white screen with logo). Once logged in, it came up with a message saying that my keyboard was low on battery. I restarted. This time it booted normally but still a lot more slowly. Again I restarted. It took a while to shut down. Finally it started a lot quicker but still slightly slow. Later that night I used iMovie to import some clips from my Panasonic AVCHD Camcorder. I left it to import. During this time my iMac went to sleep. When I came back (once it was done) I pressed the space bar to 'wake' my mac. It light up with a black screen for about a min before showing the OS with iMovie saying "completed import". Any idea on how to fix this slowness?