# CMP0042

`MACOSX_RPATH` is enabled by default.

CMake 2.8.12 and newer has support for using `@rpath` in a target's install name. This was enabled by setting the target property `MACOSX_RPATH`. The `@rpath` in an install name is a more flexible and powerful mechanism than `@executable_path` or `@loader_path` for locating shared libraries.

CMake 3.0 and later prefer this property to be ON by default. Projects wanting `@rpath` in a target's install name may remove any setting of the `INSTALL_NAME_DIR` and `CMAKE_INSTALL_NAME_DIR` variables.

This policy was introduced in CMake version 3.0. It may be set by `cmake_policy()` or `cmake_minimum_required()`. If it is not set, CMake warns, and uses `OLD` behavior.

Note

The `OLD` behavior of a policy is `deprecated by definition` and may be removed in a future version of CMake.