Windows 11 bootable usb installer from MacOSX

• Use 'Disk Utility' application to format the USB drive in MS-DOS (FAT) format
  
• Download the windows ISO file from the Windows website or other source
• Extract the ISO and copy all but the 'sources' directory into your USB
• Create a 'sources' directory into your USB and copy everything from the ISO's 'sources' directory but 'install.wim'
  
• Install Homebrew in your Macbook. Homebrew is a missing package manager for macOS (or Linux)
• Go to this website https://brew.sh 
• Copy the comand
• Paste it in a 'Terminal'
• Use Homebrew to install wimlib
• $brew install wimlib
• Use wimlib to split 'install.wim' into two files (install.swm and install2.swm) as follows into your installer USB:
• $wimlib-imagex split /Volumes/.../sources/install.wim /Volumes/.../sources/install.swm 4000
• Plugin the USB into your PC and select the boot option (by hitting the key F9/F11/ALT)
• Follow the click and install rest of the process to successfully install Windows 11 into your PC

 

 

Reference: Create bootable Windows 11 installation USB from macOS