osx: rosrun cannot find librospack dynamic library

I installed ros (kinetic) on my Mac Sierra 10.12.6. It seems to be up and running as it has no problem with roscore. Though, when I want to run the turtlesim package, it gives me an error:

    dyld: Library not loaded: @rpath/librospack.dylib
Referenced from: ~/ros_catkin_ws/install_isolated/bin/rospack

The folder containing the librospack.dylib file is already included in the DYLD_LIBRARY_PATH but I have no idea why it cannot find the library.