i did a thing
https://codeberg.org/vimuser/rmac
usage: ./rmac
generates random mac address. can also specify e.g.:
./rmac 00:1f:16:??:??:??
or maybe
./rmac ??:??:??:??:??:??
? means random. code taken from nvmutil, from libreboot. adapted into a standalone util.
someone showed me their script that runs when they boot, and it uses all manner of... bash.... to generate random mac addresses. i wrote this for them, but decided to publish it.
just a stupid simple utility
pipe it to whatever you want.