Hello all, I have heard that Macs do not need to be defrag...but I have a Mac mini 2009 (bought three months before the 2010 came out) and the hard drive is sounding like it needs to be defrag - acting "just like" my PCs over the years... This also happens when I am booting up, but stops when done. Occasionally, it starts up again when I am surfing the web, or using a program. I have read and heard that Mac OX does "not' need such a thing, but again, the hard drive "sounds" like it does... The hard drive does not appear to be damaged. Please advise.