This short tutorial provides the instruction for displaying the hard disk on Mac desktop. Launch Finder application then click the Finder menu next to Apple logo and select Preferences with displayed menu list.
In the Finder Preferences Window, mark the check box Hard disks under Show these items on the desktop.
This would display your Hard Disk on the Mac Desktop with the default name as Macintosh HD. If you want to rename the display name of the hard disk then tap the name twice click and provide a name of your choice