As of Vectorworks 2017 SP2, we now officially support the macOS Sierra 10.12 operating system. Make sure to visit http://www.vectorworks.net/support/downloads/product-updates to find the latest service pack for Vectorworks 2017, or use the Check for Updates function directly in the application under the Vectorworks or Help menus.   If you encounter any issues you believe to be related to the Sierra OS update after you install 2017 SP2, please post in the troubleshooting subforum here: