Marius Strobl of the FreeBSD project has announced the 10.3-BETA3 FreeBSD. In terms of UEFI, there are two new UEFI bootloader commands, ‘gop‘ and ‘uga‘:
Two new commands have been added to the amd64 framebuffer driver
of the UEFI boot loader. The first is `gop` (as in Graphics Output
Protocol), which allows to diagnose problems with efifb(4) but also
to set the current graphics mode on machines employing GOP. With
`uga` (as in Universal Graphics Adapter), it is possible to do the
same on systems using the UGA protocol, which mainly translates to
Apple hardware. The latter change also generally introduced UGA
support and currently hardcodes the necessary settings for mid-2007
iMacs (iMac7,1) and late-2007 MacBooks (MacBook3,1). But it is
likewise possible to manually supply the necessary information for
additional systems.
https://lists.freebsd.org/pipermail/freebsd-stable/2016-February/084238.html
Firmware Security 