Having trouble loading your dynamic libraries from inside an app-folder on macOS? Tried setting both DYLD_LIBRARY_PATH and DYLD_FALLBACK_LIBRARY_PATH through scripts without success? So did I, and here is how I managed to solve it:

First copy the library next to the binary inside the app-folder:

$ ls
Example.app libexample.dylib
$ cp libexample.dylib Example.app/Contents/MacOS/

Then add a rpath to the binary pointing to @loader_path/.:

$ install_name_tool -add_rpath @loader_path/. Example.app/Contents/MacOS/Example

After this you should be able to load the library during runtime. This is super useful if you are trying to load libraries that the binary has not been linked against during build. I ran into this problem when using using LuaJit FFI functions in projects bundled with Defold.