NetBSD/macppc on a PowerPC G4 Mac Mini
Mid 2000s PowerPC Macs are like a strange alternate reality these days. Looking at eBay, this hardware is still affordable-ish, so not entirely restricted to vintage hardware collectors with too much disposable income. NetBSD, of course, still has excellent support for them.
I never had one at the time (although I remember the struggles of a friend attempting to play an online game with only one mouse button), but I do enjoy the weirdness of OpenFirmware.
The G4 Mac Mini has a DVI port. Do not use it to connect to modern monitors with DVI! Anything around 1080p exceeds its maximum clock speed and you won’t get video output.
I’ve had the best luck using a passive DVI to VGA adapter and connecting to 1080p monitors with VGA. It’s amazing how versatile analog is…
I recommend following Sevan Janiyan’s installation guide for NetBSD/macppc. He recommends dual booting. It’s important to keep Tiger around for emergencies, upgrading, in case you want to run any classic PowerPC Mac OS children’s games, and so on.
