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Make Windows USB Installer on Mac
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| #!/bin/bash | |
| # Installs Homebrew and Wimlib if not already installed, | |
| # then formats and prepares an external USB device as | |
| # a bootable Windows installer from your Windows ISO. | |
| # | |
| # Usage: ./make_windows_usb.sh windows_installer.iso | |
| # (first make executable with: chmod u+x ./make_windows_usb.sh) | |
| # | |
| # Insert a single external USB target device before running. | |
| # Do not use blindly – bad things can happen. | |
| ####################################################################################### | |
| # Colours | |
| BoldRed='\033[1;31m' # Critical Errors | |
| BoldGreen='\033[1;32m' # Success Messages | |
| BoldYellow='\033[1;33m' # Warnings or User Prompts | |
| BoldBlue='\033[1;34m' # Information or Status Messages | |
| NoColour='\033[0m' # Reset Colour | |
| ####################################################################################### | |
| # Errors | |
| # Using an array to store error messages | |
| errors[0]="${BoldRed}No ISO image specified.${NoColour}\nUsage: ./make_windows_usb.sh windows_installer.iso" | |
| errors[1]="${BoldRed}Please make sure you have exactly one USB storage device attached.${NoColour}\nusb_disk_count devices found" | |
| errors[2]="${BoldRed}Fatal Error:${NoColour} There was a problem formatting the disk." | |
| errors[3]="${BoldRed}Fatal Error:${NoColour} There was a problem rsyncing the files." | |
| errors[4]="${BoldRed}Fatal Error:${NoColour} There was a problem creating the installation files." | |
| errors[5]="${BoldRed}Error:${NoColour} There was a problem ejecting the USB device." | |
| errors[6]="${BoldRed}Error:${NoColour} There was a problem unmounting the ISO." | |
| ####################################################################################### | |
| # Sanity Check | |
| if [ $# -eq 0 ]; then | |
| echo -e ${errors[0]} | |
| exit 1 | |
| fi | |
| usb_disk_count=$(diskutil list | grep "external" | awk 'END {print NR}') | |
| if [ ! $usb_disk_count -eq 1 ]; then | |
| echo -e ${errors[1]} | sed "s/usb_disk_count/$usb_disk_count/g" | |
| exit 1 | |
| fi | |
| ####################################################################################### | |
| # Homebrew | |
| echo -e "${BoldBlue}Preparing Homebrew.${NoColour}" | |
| which -s brew | |
| if [[ $? != 0 ]] ; then | |
| echo -e "${BoldYellow}Installing Homebrew.${NoColour}" | |
| /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" | |
| else | |
| echo -e "${BoldBlue}Making sure Homebrew is up-to-date.${NoColour}" | |
| brew update &>/dev/null | |
| fi | |
| ####################################################################################### | |
| # Wimlib | |
| echo -e "${BoldBlue}Preparing Wimlib.${NoColour}" | |
| lib="wimlib" | |
| lib_exec="wimlib-imagex" | |
| which -s $lib_exec | |
| if [[ $? != 0 ]] ; then | |
| echo -e "${BoldYellow}Installing Wimlib.${NoColour}" | |
| brew install $lib | |
| else | |
| echo -e "${BoldBlue}Making sure Wimlib is up-to-date.${NoColour}" | |
| brew outdated $lib &>/dev/null || brew install $lib | |
| fi | |
| ####################################################################################### | |
| # ISO Disc Image | |
| echo -e "${BoldBlue}Preparing ISO.${NoColour}" | |
| image_file="$1" | |
| IFS=$'\n' read -d'\n' iso_dev_entry iso_mount_point < <( | |
| hdiutil mount "${image_file}" | awk '{print $1; print $2}' | |
| ) | |
| echo -e "${BoldBlue}ISO mounted at ${iso_mount_point}.${NoColour}" | |
| ####################################################################################### | |
| # USB Drive File Copy | |
| echo -e "${BoldBlue}Preparing USB.${NoColour}" | |
| usb_disk=$(diskutil list | grep "external" | head -n 1 | awk '{print $1}') | |
| usb_label="WINDOWS" | |
| usb_mount_point="/Volumes/$usb_label" | |
| echo -e "${BoldYellow}Ready to format $usb_disk.${NoColour}" | |
| read -p "Press any key to continue or ctrl-c to abort." | |
| # Format USB drive | |
| diskutil eraseDisk MS-DOS "${usb_label}" MBR ${usb_disk} || { echo -e ${errors[2]}; exit 1; } | |
| echo -e "${BoldBlue}USB formatted. Checking mount status...${NoColour}" | |
| diskutil list # Debugging output to check mount status | |
| # Rsync - Copy files to USB | |
| echo -e "${BoldYellow}Ready to start writing contents of $image_file to $usb_disk.${NoColour}" | |
| read -p "Press any key to copy source files to USB (step 1)." | |
| rsync -avh --progress --exclude=sources/install.wim ${iso_mount_point}/ ${usb_mount_point} || { echo -e ${errors[3]}; exit 1; } | |
| echo -e "${BoldBlue}Rsync complete. Ready to split install.wim...${NoColour}" | |
| # Wimlib - Split install.wim into smaller files | |
| read -p "Press any key to copy files to USB (step 2)." | |
| wimlib-imagex split "$iso_mount_point/sources/install.wim" "$usb_mount_point/sources/install.swm" 3800 || { echo -e ${errors[4]}; exit 1; } | |
| # Eject the mounted volumes | |
| echo -e "${BoldBlue}All done.${NoColour}" | |
| read -p "Press any key to eject mounted volumes or ctrl-c to abort." | |
| hdiutil eject ${usb_mount_point} || { echo -e ${errors[5]}; } | |
| hdiutil eject ${iso_mount_point} || { echo -e ${errors[6]}; } | |
| echo -e "${BoldGreen}All done!${NoColour}" | |
| echo "You can unplug the USB drive now." |
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