To resolve, you will need to update your Ironkey D300SM (Serialized Managed) secure USB drive for MacOS Catalina. To update, click on the link below to download the IKD300SM_Mac_Updater.app and IKD300SM Mac Updater Instructions.
Note: Please read the updater instructions in its entirety prior to running the update.
Updater:
https://media.kingston.com/support/downloads/IKD300SM_Mac_Updater.zip For more information about the "App” not optimized or “App” needs update error message,
feel free to reference Apple’s support article.
https://support.apple.com/en-us/HT208436MacOS: IKD300SM_Mac_Updater.app supported on MacOS 10.15 Catalina.
FAQ: KIK-D300SM-CATA