I tried installing TrueOS on my (spare) laptop. It failed and I registered the following ticket: https://github.com/trueos/trueos-core/issues/91
It got closed as the problem was not TrueOS specific. We where able to replicate it using FreeBSD-12.0-CURRENT-amd64-20160829-r305028-memstick.img.
It was suggested to me I register a bug here.
Created attachment 220235 [details]
A 2016 photograph from the earlier issue in the TrueOS repo
The second of the two 2016 photographs from <https://github.com/trueos/trueos-core/issues/91#issuecomment-254068020>.
Visually, helping to distinguish this bug from more recent bug 244906 (kernel booted by loader.efi on VMware Fusion crashes in EFI firmware), which to my untrained eye is also an installer hang of sorts.