dyld: Library not loaded ... Reason: Image not found

How I fixed it:

1. libCore.so is a library from ROOT framework, which MyProg uses.
2. If I understand correctly, the message Library not loaded: @rpath/libCore.so Referenced from: /Volumes/MyProg Reason: image not found means that linker found the library, but can't use it.
3. Root, during installation uses clang by default. Meanwhile as I prefer gcc and MyProg uses gcc.

4. I have reinstalled root with gcc compiler:

   ./configure --with-cxx=g++ --with-cc=gcc --with-ld=g++

5. I have recompiled MyProg.

and now I can debug it with gdb.

i have solved this issue by changing the following settings

Go to Project Setting Your_Target->General->Embedded Binaries-> Click on + button and add your library here

I solved this issue with "Embedded Binaries" in the General project settings.

You can find more information about rpath here: link

So you need to point the path to your libCore.so, but honestly I have not faced with this library so I don't know where is it located.

You can check also this answer to understand what it is rpath: answer