For ARM64 macOS image builds and interactive QEMU, use the macOS guide. The full suite below is not qualified on macOS: host fixtures can require x86/ELF tooling, and VM fixtures can depend on Linux ...
The check computes the exact figure. Window (python -m installer.gui, installer/gui.py draws, installer/guilogic.py decides): form, step list with progress, space line, collapsible log, Cancel ...