That could be an issue with how Fast-RTPS is being linked. It sounds like it isn't using RPATH and it should be. Even without RPATH it should work if `~/ros2-osx/lib` is in your `DYLD_LIBRARY_PATH` environment variable after you source `~/ros2-osx/setup.bash` (this is the right one to source in most cases). If it is in the variable, then you may have SIP enabled which is a security feature in macOS that prevents propagation of the `DYLD_LIBRARY_PATH` to "system" binaries, like bash and make, which reside in `/usr/bin` and similar PATH folders. If it is SIP then you can disable it (not recommended for security, but will work around the issue): - https://support.apple.com/en-us/HT204899 - http://osxdaily.com/2015/10/05/disable-rootless-system-integrity-protection-mac-os-x/ --- [Visit Topic](https://discourse.ros.org/t/library-not-loaded-libfastcdr-dylib/2195/2) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: