@crazybirdy: For some reasons I'm still using old MBR scheme, if you could share patched "OSInstall" framework binary for MBR under 10.13 is great appreciated. Thanks.
I made the MBR patch yesterday.
But we can't pass the OSInstall.mpkg error with MBR installer first.
We can boot to the MBR installer language selection GUI, but still can't start the installer, so, I did not upload it.
If you want to try it, here as attached with Enoch_2884 support 10.13 modified by myself.
The 2884_boot with 10.13 kernel patcher works fine to boot MBR installer disk, and installed system disk(installed with clover 4082).
The OSInstall.mpkg error kills the MBR installer.
As I remembered, 10.12 has the same issue if I modify OSInstall.mpkg, so since 10.12, I only patched the OSInstaller for MBR, keep OSInstall.mpkg untouched in order to bypass the error.
I think, maybe some framework is checking the OSInstall.mpkg, need to find it out, and patch it.
But, I have no idea.
Finally, I found a way to install to MBR directly with stage2 automated disk which made by High Sierra beta Installer.app.
Need more patch for OSInstaller, and need make Basesystem boot disk with MBR patch to load the stage2 automated disk with /macOS Install Data/ to finish the MBR installation.
Will upload the new MBR patch with How-To to download section later, when I have free time.
upload new MBR patch to downlaod section with Enoch 2884.