

If you are using a newer Windows 10 ISO (after version 201809), then UUByte ISO Editor is the best app for creating a bootable USB on Mac. I managed to create several bootable Windows 10 USBs on Mac (Mojave, Catalina and Big Sur) in recent years. I had to create a Windows partition on my hard drive and boot into that to make a functioning boot drive. The ExFAT formatted drive with Windows ISO did not work as a bootable drive. Will report back if I run into any issues. All this said, I have yet to actually use this drive to INSTALL Windows as I'm building the computer tomorrow. I just did this with a Sandisk 32GB drive and it worked perfectly.

Here are the steps! For reference I'm running Mac OS Monterey (v12.0.1) The easiest thing to do is just to reformat your drive to 'ExFat' using Disk Utility. Sorry if this is a breach of etiquette (commenting on an old thread!) You don't need to download any new software to do this, everything is already included in current Mac OS. Then run the following command to split and copy the install.In case anyone stumbles onto this thread I'm going to give what I believe to be the easiest solution to this problem. Rsync -vha -exclude=sources/install.wim /Volumes/CCCOMA_X64FRE_EN-US_DV9/* /Volumes/WINDOWS11 Use the following command to copy the content of the ISO image-excluding the install.wim file-onto the USB drive: The second command will use wimlib to split and copy the install.wim file to the USB stick.

The first command will copy all the files apart from the install.wim file (which is 4.2GB) in size. Since the installer file is bigger than 4GB, we'll be using two separate commands to create the bootable disk. Related: How to Make a Bootable CD/DVD/USB to Install Windows If it's different (due to a different language preference), make sure to change it accordingly in the commands below. Remember to match the file name exactly to the one above. You can do this by double-clicking on the ISO file, which should then show up in your Mac's connected devices as CCCOMA_X64FRE_EN-US_DV9 or similar. Mount the Windows 11 ISO from the Downloads folder on your Mac.
