To resolve, you will need to update your Ironkey D300 encrypted USB drive for macOS Catalina. To update, click on the link below to
download the and IKD300 Mac Updater Instructions. Note: Please read the updater instructions in its
entirety prior to running the update.


For more information about the "App” not optimized or “App” needs update error message,
feel free to reference Apple’s support article.

macOS: supported on macOS 10.15 Catalina.