[smashedtoatoms]

I made an asdf-vm installer for it that I've been keeping up to date: https://github.com/smashedtoatoms/asdf-sbcl

If you don't want to use it, it installs from source, so you might be able to look at the source to see an example of how to build it yourself. It works on intel and arm macs.

[tempodox]

I've looked into the repo and it seems to download sbcl-1.2.11 as the bootstrapping compiler for x86_64. That is exactly what doesn't work on my machine (macOS 12, x86_64). The problem is getting a bootstrapping compiler that works on that platform.