Hi I have added boost::threads to our mac application, which means that I have to build the boost thread library. I have manage to build the universal boost static and dynamic library. When I add the static library to the project, the project builds with no problems and the dynamic library produced it added to the application package. However as soon a I try to run the application, the application fails with the error that it cannot load the dynamic library. Is there a tool on the mac to determine why a dynamic library does not load. Does anyone know why boost is causing this problem. The dynamic library to built on 10.5 with 10.4 framework. The version of boost is 1.36.0 Thanks in advance Katherine -- View this message in context: http://www.nabble.com/App-will-not-run-when-linked-to-boost-thread-library-t... Sent from the Boost - Users mailing list archive at Nabble.com.