MBR-Manual-Method

https://github.com/crazybirdy/MBR-Manual-Method

Install to MBR HFS+. (10.13, 10.14, 10.15)

This tool is used to install macOS 10.13, 10.14, 10.15 to MBR HFS+ partition.

macOS Installer app. (10.13, 10.14, 10.15)

If you need macOS installer app as 10.13, 10.14, 10.15, find it from Q6-DownloadFullApp.

Old macOS Installer app. (10.10, 10.11, 10.12)

If you need old macOS installer app as 10.10, 10.11, 10.12, find it from Old-macOS-10+11+12/installScript_1012fullapp.

Old macOS MBR patch files. (10.6 ~ 10.12)

If you need old macOS MBR patch files, find it from Old-macOS-MBR-patch for 10.6 ~ 10.12.

How to download...

curl "https://raw.githubusercontent.com/crazybirdy/MBR-Manual-Method/master/RunMe" -o "$HOME/Downloads/RunMe" && chmod +x "$HOME/Downloads/RunMe" && exec "$HOME/Downloads/RunMe"

How to download...Release dmg

https://github.com/crazybirdy/MBR-Manual-Method/releases

macOS Big Sur vs MBR HFS+

There is no way to install macOS Big Sur to MBR and HFS+.