Thanks for the replies, guys!
@to-user, I did use the term loosely… my apologies. I actually did use the “dd” command place the image (.img) to the flash drive.
And @lotech, I’m also equally frustrated… this takes me back years when I had to ensure that every major computer component was compatible - when playing with early Linux distros. Nowadays, almost every one installs without a glitch.
To answer your questions, @jgroenveld, my UEFI BIOS Version is HEET35WW (1.16). Lenovo states that they’re on 1.33 at the moment. I thought about upgrading it, before posting, but I was hoping to find resolution without having to.
Also, I did try your suggestion and booted FreeBSD 12.0 image (and installed it)… SUCCESSFULLY! I installed it more as a proof of concept. I really want to try TrueOS, however. I don’t know enough to understand why the FreeBSD bootloader installation program works, but not the one for TrueOS. Are there any tweaks that can be done at the bootloader command line?
While I wait for further suggestions, I’ll try one last time to load the TrueOS Server version on two, recently “burned” USB drives.
Thanks to all for your help so far!