Hello. I have made a plugin that links statically to boost_system and boost_filesystem libraries. I successfully compiled the plugin and it works flawlessly on my mac (OSX 10.10). However, another person on OSX 10.9.5 reported to me that he had the following error: Code: dlerror:dlopen(<link to file>, 6): Symbol not found: _fchmodat Referenced from: <link to file> Expected in: /usr/lib/libSystem.B.dylib in <link to file> dlerror:dlsym(0x60800012fbe0, XPluginReceiveMessage): symbol not found Can someone please help fix the issue? Thanks a lot!