Macintosh HD

Macintosh HD is the default name for the hard drive on a Mac. Usually, the default icon present on the wallpaper is the Macintosh HD icon. Double-clicking on it opens a zooming Finder window, which displays the files and folders lying on your hard drive. As of Mac OS X 10.4 "Tiger", the Macintosh HD icon also lies underneath the Network entry, and above the CD/DVD Drive icon, in the Finder sidebar.