I need some #help troubleshooting #openbsd installation: I cannot boot into the installation drive on the intended machine for some reason.

I downloaded install71.img for amd64 from their website. After copying to my USB drive, I can verify that it’s bootable by trying it on my main machine. On my intended machine, however, it just skips the USB and boot into the existing system.

as I’m writing this post I came across some thread saying one has to boot in legacy mode so I’ll check that out