I just got myself a PC Engines APU4D4. I miss an OpenBSD box providing home services. It’s quite simple to install and run OpenBSD on this machine. And you can even update the BIOS from OpenBSD.
Raspberry Pi can be used with a prepared OS, booted up and just used. But when it comes to customising or doing something else than what was planned, you may need to use the console. And that requires a TTL adapter connected to the GPIO. The thing is, using MacOS is not as straightforward as I thought. So here are my notes.