They contain stuff that your Mac needs in order to work properly.
The two folders called Library and System are not very interesting for beginners. The Applications folder contains all your applications. The hard drive of a brand new Mac contains four folders (click Macintosh HD to view them): If you wish to change the way things are viewed inside a Finder window, there are a few buttons you should know about. If you wish to resize a Finder window, just drag (keep mouse button pressed down) the handle in the lower right corner. We’ll now explain the most basic things about it. It’s quite easy to understand how to use a finder window. The Finder window allows you to explore the contents of your hard drive.
First, click the “Macintosh HD” icon on your desktop. Let’s get started browsing through your files.
