osx: rosrun cannot find librospack dynamic library

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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
    Reason: image not found find: ftsopen:
    No such file or directory
    [rosrun] Couldn't find executable named turtlesim_node below
    find: ftsopen: No such file or directory

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.