To resolve, you will need to update your DTLPG3 encrypted USB drive for macOS Catalina. To update, click on the link below to download the and DTLPG3 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 message,
feel free to reference Apple’s support article.

macOS: supported on macOS 10.15 Catalina.