We can use Finder to create a new folder, and give it a name of our choosing. The best place to store new folders that you create is within your Home folder.
For this example, create a new folder within your Documents folder. To do so, navigate to Documents first: In Finder, choose Documents from the Go menu.
A Finder window will appear, displaying the contents of your Documents folder. To create a new folder, choose File->New Folder from the menu bar.
When a new folder is created, its name, untitled folder, will be highlighted, waiting for you to begin typing a new name.
Just start typing, and the text, untitled folder, will be replaced with what you type…
Press the Return (or, Enter) key on the keyboard to apply the new name.