Script For https://techsviewer.com/how-to-install-mac-os-x-el-capitan-on-pc-on-virtualbox/

set_el_capitan.sh

#!/bin/bash

VM_NAME=$1

if [ -z "$VM_NAME"]
then
    # https://stackoverflow.com/questions/9449417/how-do-i-assign-the-output-of-a-command-into-an-array
    IFS=$'\n'
    VM_NAMES=( $(VBoxManage list vms | sed -En 's/"(.*)".*/\1/p') )
    unset IFS

    # https://askubuntu.com/questions/1705/how-can-i-create-a-select-menu-in-a-shell-script
    select VM_NAME in "${VM_NAMES[@]}"
    do
        break;
    done
fi

VBOX_VERSION=$(VBoxManage -v)

echo "Configureing '$VM_NAME' for VirtualBox version $VBOX_VERSION"

# https://techsviewer.com/how-to-install-mac-os-x-el-capitan-on-pc-on-virtualbox/
if [[ "$VBOX_VERSION" =~ ^4\..* ]]; then
    echo 'Version 4.xx'
    # Code for Virtualbox 4.xx
    VBoxManage modifyvm "$VM_NAME" --cpuidset 00000001 000306a9 04100800 7fbae3ff bfebfbff
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "MacBookPro11,3"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/efi/0/Config/DmiSystemVersion" "1.0"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/efi/0/Config/DmiBoardProduct" "Iloveapple"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/smc/0/Config/DeviceKey" "ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/smc/0/Config/GetKeyFromRealSMC" 1
fi

if [[ "$VBOX_VERSION" =~ ^5\..* ]]; then
    echo 'Version 5.xx'
    # Code for Virtualbox 5.xx
    VBoxManage modifyvm "$VM_NAME" --cpuidset 00000001 000306a9 04100800 7fbae3ff bfebfbff
    VBoxManage modifyvm "$VM_NAME" --cpuidset 00000001 000106e5 00100800 0098e3fd bfebfbff
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "iMac11,3"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/efi/0/Config/DmiSystemVersion" "1.0"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/efi/0/Config/DmiBoardProduct" "Iloveapple"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/smc/0/Config/DeviceKey" "ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc"
    VBoxManage setextradata "$VM_NAME" "VBoxInternal/Devices/smc/0/Config/GetKeyFromRealSMC" 1
fi