Writing the image to a USB memory stick

Decompress the downloaded image with
# lzma -d nomadbsd-X.Y.Z.efi.lzma
and write it to your USB stick using dd:
# dd if=nomadbsd-X.Y.Z.efi of=/dev/da0 bs=1M conv=sync
Make sure to use the correct device name for of=

Download

Version Image Checksum
1.0.1 NomadBSD-1.0.1 SHA256