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Virtualization BASH: Set VirtualBox Guests for macOS serial number

This script sets the VirtualBox macOS guests Serial Number and other stuff to allow a macOS to correctly see the underlying hardware. 

All my macOS guests have a name composition to easily identify the type of OS. I could had used the "OS Type", but it is too much work. 

This script only sets the serial number for Big Sur guest. The line with grep "Mac OS X 11." is used to grab only the macOS 11 guests.

#!/bin/bash
# https://en.tab-tv.com/?p=18929
 # https://github.com/MagerValp/MacModelShelf/blob/master/dump.markdown (Apple Serial Number Product Code)
 # https://mrmacintosh.com/list-of-mac-boardid-deviceid-model-identifiers-machine-models/
# MacBookPro15,1 (15-inch Mid 2018) Mac-937A206F2EE63C01
# JG5H MacBook Pro (15-inch, 2018)
 # JG5L MacBook Pro (15-inch, 2018)
 # JG5M MacBook Pro (15-inch, 2018)
 # JGH5 MacBook Pro (15-inch, 2018)
 # JGH6 MacBook Pro (15-inch, 2018)
 # JGH7 MacBook Pro (15-inch, 2018)
 # JGH8 MacBook Pro (15-inch, 2018)
sBoardId=Mac-937A206F2EE63C01
 sProductCode=JG5M
GetVMDetails() {
   sKey="$("${VB}" getextradata "${sVMName}" | tr -d '\r')" 
   sBP="$(echo "${sKey}" | grep DmiBoardProduct  | sed 's/^.*Value: //')"
   sSP="$(echo "${sKey}" | grep DmiSystemProduct | sed 's/^.*Value: //')"
   sSS="$(echo "${sKey}" | grep DmiSystemSerial  | sed 's/^.*Value: //')"
 }
if [[ "$(uname -r)" == *Microsoft ]]; then
   VB="/mnt/c/Program Files/Oracle/VirtualBox/VBoxManage.exe"
 elif [[ "$(uname -s)" == Darwin ]]; then
   VB="/Applications/VirtualBox.app/Contents/MacOS/VBoxManage"
 elif [[ "$(uname -a)" == *Cygwin* ]]; then
   VB="/cygdrive/c/Program Files/Oracle/VirtualBox/VBoxManage.exe"
 else
   VB=""
 fi
 [[ -z "${VB}" || ! -e "${VB}" ]] && exit
sValidDigit="0123456789BCDFGHJKLMNPQRTVWXYX"
nSeq=0
"${VB}" list -s vms | grep "Mac OS X 11." | cut -d\" -f2 | sort | while read sVMName; do
  echo "${sVMName}"
   GetVMDetails
   printf '   Current => %-35s : %-25s : %s : %s\n'  "${sVMName}" "${sBP}" "${sSP}" "${sSS}"
  nSeq=$((nSeq + 1))
  # iBridge2,3 J680AP 0x0B Apple T2 MacBookPro15,1 (j680)
   # MacBookPro15,1 (15-inch Mid 2018) Mac-937A206F2EE63C01
   sSequantial="1Q${sValidDigit:${nSeq}:1}"
   "${VB}" setextradata "${sVMName}" "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "MacBookPro15,1"
   "${VB}" setextradata "${sVMName}" "VBoxInternal/Devices/efi/0/Config/DmiBoardProduct"  "${sBoardId}"
   "${VB}" setextradata "${sVMName}" "VBoxInternal/Devices/efi/0/Config/DmiSystemSerial"  "C02XH${sSequantial}${sProductCode}"
  # C02 -> Factory/Line number
   # XH  -> 2018/October
  GetVMDetails
   printf '   New     => %-35s : %-25s : %s : %s\n'  "${sVMName}" "${sBP}" "${sSP}" "${sSS}"

done

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