Hardware communications require the full installation of LTFS drivers and macFUSE. If you get an error that the 'LTFS executable could not be found' or similar messages please close the application and download the installer again from View Licenses page of the website.
Follow the directions carefully to fully install all the required components. For example, FUSE is not included in the myLTO installer. Instead you must download it from the publisher's website.
Also make sure that your computer's privacy settings aren't prohibiting the installations from completing. Go to System Preferences/Privacy and unlock the settings to allow any pending installs.