FreeBSD port of LWJGL3
Build will fail on FreeBSD 11 because the binary genie is built for FreeBSD 12. The two options are, build a new one from repo https://github.com/bkaradzic/GENie or use the Linux version by changing the path to genie in the Makefile.
When build is complete, start with
./minecraft-client-1.13
From the Minecraft launcher, edit your profile and change the executable to
<absolute-path-to-this-repo>/minecraft-runtime-1.13