runMacOSVirtualBox

[silvsims]

I'm trying to install MacOS High Sierra on VirtualBox on macOS Big Sur 11.2.1 using the script runMacOSVirtualBox.sh

I have downloaded the Installer for MacOS High Sierra through installinstallmacos.py
I have copied the Installer on /Applications.

Then I gave the command "make all". The VM starts and the macOS Installer appears. I have selected the language and then the option "Install MacOS". However, it appears the message

"This copy of Install macOS High Sierra application is damaged, and can't be used to install MacOS"

The same behavior with the Mojave Installer.

Please, help !

VBoxSVC.log

selectorwindow.log

runMacOSVirtualbox.log

[silvsims]

I have tried the following:

Instead of using the menu option "Install MacOS" I tried to launch the installer directly from the Terminal using
/Install macOS High Sierra.app/Contents/MacOS/InstallAssistant

and the system installed properly