/Library: Data files, help, documentation, and so on for system applications./Developer: If XCode is installed, the default installation point for all developer tools./Applications: Default base for all applications in system.OS X adds its own special directories to the UNIX tree, under the system root: In OS X, this is a symbolic link to /private/var. A directory for log files, mail store, print spool, and other data. In OS X, this is a symbolic link to /private/tmp. The only directory in the system that is world-writable (permissions: rwxrwxrwx). These are special files that represent hardware devices on the system (character and block devices).
In OS X, this is a symbolic link to /private/etc. A directory containing most of the system configuration files for example, the password file (/etc/passwd). This directory also contains the include/ subdirectory, where all the standard C headers are. usr/lib is used for shared objects (think, Windows DLLs and \windows\system32).
These are binaries used for system administration, such as file-system management, network configuration, and so on. This is where the common UNIX commands (for example, ls, rm, mv, df) are IOS platform overview File System UNIX system directoriesĪs a conformant UNIX system, OS X works with the well-known directories that are standard on all UNIX flavors:
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