To resolve, you will need to update your DTLPG3 secure USB drive for MacOS Catalina. To update, click on the link below to download the DTLPG3_Mac_Updater.app and DTLPG3 Mac Updater Instructions. Note: Please read the updater instructions in its entirety prior to running the update. Updater: https://media.kingston.com/support/downloads/DTLPG3_Mac_Updater.zip For more information about the "App” not optimized or “App” needs update message, feel free to reference Apple’s support article. https://support.apple.com/en-us/HT208436 MacOS: DTLPG3_Mac_Updater.app supported on MacOS 10.15 Catalina.