@Kloping can you try running `brew install poco` to see if that resolves your issue. If so I'll update the install instructions for OS X that you linked to above. Thanks. --- [Visit Topic](https://discourse.ros.org/t/talker-example-on-macos-failed-ros2/1649/4) 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: