I am using a MacBook pro running Catalina to create a bootable USB that I can use to install Windows 10 on another machine. Initially I formatted the USB as FAT32, but the Windows setup ISO includes a file that is greater than the max file size (4 GB).
I understand that ExFAT can handle files greater that 4 GB, but cannot be bootable. Therefore my plan was to partition the USB to have a FAT32 bootable partition, and an ExFAT partition. I would then load the ISO onto the second partition.
The problem I have now is that I cannot re-partition the USB drive. The option in the disk utility is greyed out. I erased it with a number of different formats, but to no avail. I also investigated command line options for
eraseDisk but it doesn't seem to take a partition size parameter.
So, the question is can I create a bootable USB that will store a file greater than 4GB? How?
Secondly, if there is a better way to go about installing Windows 10 on a bare machine, please let me know.