I have a Mid-2015 MacBook Pro that I'm trying to get OpenBSD on. I installed from the latest snapshot and from -RELEASE (installXX.fs written to SD card). The install goes fine (using an axen(4) USB dongle for connectivity) but upon reboot, it gets part way through, then the screen goes blank with the backlight on. Although I can briefly see the axen(4) attach, it doesn't seem to get an IP address if I let it sit around for a few minutes. I can't get the dmesg, and I can't determine what the last message is before the screen blanks. It doesn't appear to respond to the keyboard.
Has anyone gotten this working? Google is pointing me to a few posts from the likes of jcs@ and others about systems that are either slightly newer or slightly older than mine. Any suggestions on getting a good dmesg out of it? Devices I should consider disabling from UKC to get this thing off the ground? TIA- ax0n