To resolve, you will need to update your Ironkey D300SM (Serialized Managed) encrypted USB drive for macOS Catalina. To update, click on the link below to download the and IKD300SM 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.