I dont have a machine that I can run Linux Framebuffer on, I'd be better of building it on my G4, to asking a friend to compile it for me, so I can run it under mojave
In that case, 10.4 and 10.5 are options. There's also a front end that works in classic Mac OS, which a G4 is fast enough to run usably. It's not in the HOWTO yet, but I can add it.