These are the steps I use to create a Window 10 installer on MacOS. I only do this once in a blue moon and I want to make sure I keep track of these commands before they are lost in my history.
# Format the USB drive as MS-DOS and name it "WIN10" $ diskutil eraseDisk MS-DOS "WIN10" MBR /dev/disk127 # Copy files from mounted Windows 10 ISO to new drive # > Make sure to preserve trailing slash (/) $ rsync -vha --exclude=sources/install.wim /Volumes/CCCOMA_X64FRE_EN-US_DV9/ /Volumes/WIN10 # Split and copy the last file $ wimlib-imagex split /Volumes/CCCOMA_X64FRE_EN-US_DV9/sources/install.wim /Volumes/WIN10/sources/install.wim 4000
The prerequisites for the above commands are knowing the id of the mounted USB drive and
wimlib-imagex. MacOS only has write capabilities for the older
MS-DOS file format which has a 4GB single file size limit. This is why we use
wimlib-imagex to split the 5GB install.wim into two files.
You can find the ID of your USB drive with Disk Utility.
It looks like I installed
wimlib-imagex with HomeBrew.
$ brew install wimlib
See you later future Baylor!