diff --git a/macos-guest-virtualbox.sh b/macos-guest-virtualbox.sh
index 7394ef7..a76cab1 100644
--- a/macos-guest-virtualbox.sh
+++ b/macos-guest-virtualbox.sh
@@ -2,34 +2,29 @@
 # Semi-automatic installer of macOS on VirtualBox
 # (c) myspaghetti, licensed under GPL2.0 or higher
 # url: https://github.com/img2tab/macos-guest-virtualbox
-# version 0.69.3
+# version 0.69.4
 
 # Requirements: 40GB available storage on host
 # Dependencies: bash >= 4.0, unzip, wget, dmg2img,
 #               VirtualBox with Extension Pack >= 6.0
 
 # Customize the installation by setting these variables:
-vmname="macOS"                    # name of the VirtualBox virtual machine
-storagesize=22000                 # VM disk image size in MB. minimum 22000
-cpucount=2                        # VM CPU cores, minimum 2
-memorysize=4096                   # VM RAM in MB, minimum 2048
-gpuvram=128                       # VM video RAM in MB, minimum 34, maximum 128
-resolution="1280x800"             # VM display resolution
+vmname="macOS"                   # name of the VirtualBox virtual machine
+storagesize=22000                # VM disk image size in MB. minimum 22000
+cpucount=2                       # VM CPU cores, minimum 2
+memorysize=4096                  # VM RAM in MB, minimum 2048
+gpuvram=128                      # VM video RAM in MB, minimum 34, maximum 128
+resolution="1280x800"            # VM display resolution
 
-# The following variables can be found on a genuine Mac using the command
-# in the comment above each of the following variable assignments
+# The following commands may provide the values for the parameters of the
+# Clover SMBIOS options screen. Run them on a genuine Mac.
+# ioreg -l | grep -m 1 "Device Model Name"
 # ioreg -l | grep -m 1 product-name
-DmiSystemProduct="MacBookPro11,3"
 # ioreg -l | grep -m 1 IOPlatformSerialNumber
-DmiSystemSerial="NO_DEVICE_SN"
 # ioreg -l | grep -m 1 board-id
-DmiBoardProduct="Mac-2BD1B31983FE1663"
 # nvram 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:MLB | awk '{ print $NF }'
-DmiBoardSerial="NO_LOGIC_BOARD_SN"
 # ioreg -l | grep -m 1 PlatformUUID
-DmiSystemUuid="CAFECAFE-CAFE-CAFE-CAFE-DECAFFDECAFF"
 # ioreg -l -p IODeviceTree | grep \"system-id
-UUID="bytes:qqq7u8zM3d3u7v//AAAREQ=="
 
 # welcome message
 whiteonred="\e[48;2;255;0;0m\e[38;2;255;255;255m"
@@ -47,8 +42,9 @@ The script checks for dependencies and will prompt to install them if unmet.
 Some stages may fail due to errant keyboard presses; run the script with
 "'${whiteonblack}"${0}"' stages'${defaultcolor}'" to see how to run only certain stages.
 
-For iCloud and iMessage connectivity, you will need to provide a valid
-Apple serial number. macOS will work without it, but not Apple-connected apps.
+For iCloud and iMessage connectivity, you will need to install Clover and
+configure the SMBIOS options. macOS will work without these parameters, but not
+Apple-connected apps.
 
 The installation requires '${whiteonred}'40GB'${defaultcolor}' of available storage, 25GB for
 temporary installation files and 15GB for the virtual machine. Deleting the
@@ -59,12 +55,12 @@ read
 
 # custom settings prompt
 printf '
-vmname="'"${vmname}"'"              # name of the VirtualBox virtual machine
-storagesize='"${storagesize}"'           # VM disk image size in MB. minimum 22000
-cpucount='"${cpucount}"'                  # VM CPU cores, minimum 2
-memorysize='"${memorysize}"'             # VM RAM in MB, minimum 2048
-gpuvram='"${gpuvram}"'                 # VM video RAM in MB, minimum 34, maximum 128
-resolution="'"${resolution}"'"       # VM display resolution
+vmname="'"${vmname}"'"             # name of the VirtualBox virtual machine
+storagesize='"${storagesize}"'          # VM disk image size in MB. minimum 22000
+cpucount='"${cpucount}"'                 # VM CPU cores, minimum 2
+memorysize='"${memorysize}"'            # VM RAM in MB, minimum 2048
+gpuvram='"${gpuvram}"'                # VM video RAM in MB, minimum 34, maximum 128
+resolution="'"${resolution}"'"      # VM display resolution
 
 These values may be customized by editing them at the top of the script file.
 
@@ -416,18 +412,6 @@ VBoxManage modifyvm "${vmname}" --cpus "${cpucount}" --memory "${memorysize}" \
  --vram "${gpuvram}" --pae on --boot1 dvd --boot2 disk --boot3 none \
  --boot4 none --firmware efi --rtcuseutc on --usbxhci on --chipset ich9 \
  --mouse usbtablet --keyboard usb --audiocontroller hda --audiocodec stac9221
-VBoxManage setextradata "${vmname}" \
- "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "${DmiSystemProduct}"
- VBoxManage setextradata "${vmname}" \
- "VBoxInternal/Devices/efi/0/Config/DmiSystemSerial" "${DmiSystemSerial}"
-VBoxManage setextradata "${vmname}" \
- "VBoxInternal/Devices/efi/0/Config/DmiBoardProduct" "${DmiBoardProduct}"
- VBoxManage setextradata "${vmname}" \
- "VBoxInternal/Devices/efi/0/Config/DmiBoardSerial" "${DmiBoardSerial}"
-VBoxManage setextradata "${vmname}" \
- "VBoxInternal/Devices/efi/0/Config/DmiSystemUuid" "${DmiSystemUuid}"
-VBoxManage setextradata "${vmname}" \
- "VBoxInternal/Devices/efi/0/Config/UUID" "${UUID}"
 VBoxManage setextradata "${vmname}" \
  "VBoxInternal/Devices/efi/0/Config/DmiSystemVendor" "Apple Inc."
 VBoxManage setextradata "${vmname}" \