# OS X* Systems

For Apple* OS X* operating systems, the default installation location for the library is `/opt/intel/composer_xe_2013/tbb`. The following table describes the subdirectories.

Intel® Threading Building Blocks Subdirectories on OS X* Systems
Item | Location | Environment Variable
--- | --- | ---
Include files | `include/tbb/*.h` | `CPATH`
Shared libraries | `lib/ <lib> <variant> .dylib` where:
<lib> | Version
--- | ---
`libtbb` | General library
`libtbbmalloc` | Memory allocator
`libtbb_preview` | Community preview features library
<variant> | Version
--- | ---
(none) | Release version
`_debug` | Debug version
| `LIBRARY_PATH` `DYLD_LIBRARY_PATH`
Examples | `examples/<class>/*/.` |
GNU Makefile for example | `examples/<class>/*/Makefile` where class describes the class being demonstrated. |
Xcode* Project | `examples/<class>/*/xcode/` |

Parent topic: Package Contents