What is the Library folder on Mac?
The Library folder In macOS is the system folder which keeps important support files, such as user account settings, preference files, containers, application scripts, caches, cookies, fonts and other service files.
All these files help your Mac and applications to function as they should and work fast.
Why is the Library folder hidden?
Apple keeps Library invisible in order to protect users from accidental deletion or modification of important files stored there: application settings, caches and other system files needed to run the programs. Removal of some files in the Library folder can damage your system or the performance of some apps.
You shouldn’t remove files from the Library if you don’t understand what they are used for.
How to find the Library folder on Mac (macOS Sierra, Mojave or Catalina)
Get the Library folder
Open Finder window.
Click Go in a Menu Bar → select Go to Folder. Or use the Cmd+Shift+G key shortcut.
Type ~/Library and click Go in a dialog window.
The required Mac Library folder will be shown.