Enable the Show Library Folder check box and your Home Library will be visible evermore or at least until you deselect the check box. Application Support: Some applications store their support files here; others store theirs in the main root-level public Library folder.
How do I navigate to the Preferences folder?
This folder is empty until you install your own fonts here. The easiest way to install a font is to double-click its icon and let the Font Book utility handle it for you.
To install a font that only you can use: To install a font for all users of this Mac: The files here hold the information about whichever things you customize in OS X or in the applications you run. Whenever you change a system or application preference, that info is saved to a file in the Preferences folder. You should never need to open or use this folder unless something bad happens — say, you suspect that a particular preferences file has become corrupted that is, damaged.
The invisible Library subfolder of your Home folder is the repository of everything that OS X needs to customize your Mac to your tastes.
The public Library folder is used to specify preferences for all users on this Mac. This Library folder, however, is all about you and your stuff. Be cautious with all Library folders.
How to Access Hidden User Library folder on Mac OS
OS X is very persnickety about how the folders and files within it are organized. You can add items to and remove items safely from most public or Home Library folders, but leave the folders themselves alone.
If you remove or rename the wrong folder, you could render OS X inoperable. The formerly invisible Library folder appears in the Go menu as long as the Option key is pressed. You probably have folders called Mail, Safari, Logs, and Preferences, for example. Enable the Show Library Folder check box and your Home Library will be visible evermore or at least until you deselect the check box.