I have been testing OpenBSD over the years on my 2016 Macbook, and it has always failed to boot the installer. Linux works and the other BSDs does boot but with no keyboard support. The installer gets stuck after the NVMe drive
I have a photo of the screen uploaded here: https://pasteboard.co/TMpCvUayCM8I.jpg I figure this is hopeless but It would be nice to give this small nice, old and abandoned hardware a second life.