Under Library -> LaunchDaemons I see two .plists:
And I have the 'Start TeamViewer with System' checkbox selected.
Yet, after my computer reboots, I'm not able to connect to it with via Unattended Access. I simply get the message that "TeamViewer not running on partner computer".
Using Lingon X, here's a visual even showing com.teamviewer.service, which is supposed to run as root at startup.