The file system is an important part of any operating system. After all, it’s where users keep their stuff. The organization of the file system plays an important role in helping the user find files. The organization also makes it easier for apps and the system itself to find and access the resources they need to support the user.
This document is intended for developers who are writing software for OS X, iOS, and iCloud. It shows you how to use the system interfaces to access files and directories and how to move files to and from iCloud. This document also provides guidance on how best to work with files, and it shows you where you should be placing any new files you create.