Thanks. I successfully built the official bmc firmware latest head following the readme instructions for macOS 🎉 One problem in case anyone else stumble upon this: My docker desktop on macos had a disk usage limit set to 60gb so the build failed first. Upped that to 200gb in Settings -> Resources -> Disk usage limit, rebuilt the devcontainer to start clean and followed the instructions in the readme to build and after a longer while it finished successfully.