Sorry. We don’t support LDD version 4.3.10 anymore. If you still use version 4.3.10 you will experience errors when launching the application. You can still use “offline” mode if you wish. We urge you to update, use the download link, and install free application for Windows PC & Mac OSX. LEGO Digital Designer 4.3 Minimum system requirements for Mac Operating system: OS X 10.10 or higher CPU: Inte
