Hi all, I am using a Mac Mini, Which is having a capacity of 74.2 GB. Hardly i made use of 15 or 16 GB of that.. As i felt some slowness, i tried running "Disk Utility" . Recently i found that the free space is only 2.4GB, instead of around 55GB.. Disk Utility is showing USED SPACE :71.8GB If i am calculating all folders in "Machintosh HD" (Application, Library,System, etc..), it wil come around 14-15 GB only... Why so? plz help !!