Hi guys, I was just able to install Debian bare metal on my Mac Mini M1. I then converted it into a Linux Mint Debian Edition! Look at the picture! This is probably the first Linux Mint arm64 running bare metal on a silicon Mac.
It is unbelievable how fast this machine is under Mint! I installed Mint with all dependencies from a console type Debian installation in like a minute!
It is not yet possible to install such a system automatically, as Debian does not yet give support officially using their debian-installer. At the moment one can only install Linux Mint on Apple silicon by hand.