Macintosh HD

Macintosh HD is the 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 Tiger, the Macintosh HD icon also lies underneath the Network entry, and above the CD/DVD Drive icon, in the Finder sidebar.