Easiest just to go up top GO/Application, bam
Once in the applications folder you can right click on the Cubase icon and see whats in the folder as well
He can go to the applactions folder, click and hold on Cubase, drag it to his toolbar and instant shortcut
**Let him know if he trashes Cubase thinkin its a SHORTCUT, it is GONE, into the trashcan
This article provides the location of all Cubase files on a Mac. No, the structure is not the same as on a PC at all.