This was so complicated for some reason and took me many hours to figure out. If it says operating system not found, this worked for me. (Once that finished, I deleted the old wimaa and wimab files) del install.wimaaĪfter this I followed the rest of the guide, applied the image, add boot records (The disk volumes for me were different than what the guide should have given me, but that might have been a mistake on my part) and booted my pc back up after removing the USB. Navigated to that volume, went to the sources folder and typed the commands: type install.wimaa install.wimab > install.wim So I go to the command prompt and follow the guide and type out the diskpart commands it says (I followed MBR).Īfter that, I copied the contents of the USB drive to the Windows 10 volume that I created from the guide (I think I used xcopy, but there's other commands for it).

This time, when I booted from the USB, I get the Windows boot media, but it obviously cannot find install.wim. I then moved all the ISO files to the FAT32 USB, but with the new install.wim files.

This creates install.wimaa and install.wimab.

split -b 3700m /Volumes/CCCOMA_X64FRE_EN-GB_DV9/sources/install.wim install.wim I used split terminal command to split the install.wim file. I found this amazing guide for it (), but it was for Windows so I had to adapt it. Here is how I did it for anyone else who has this problem. So, I needed to use FAT32 for my BIOS to accept it, but both the April 2018 and October 2018 updates had an install.wim file that was over 4 GB (I downloaded the English international version for both, maybe other versions are different?). The WIM is read-only (file permissions, header flag, or split WIM).Ĭp install.wim /Volumes/MYUSB/sources/install.wim You may need sudo, because you could encounter an error like this: Can't modify '/home/roger/win/sources/install.wim': Permission denied 'install.wim' optimized size: 3311533 KiB Wimlib-imagex optimize install.wim -solid 'install.wim' original size: 4463411 KiBĪrchiving file data: 9 GiB of 9 GiB (100%) done I managed to reduce the size bellow 4Go, my FAT32 usb thumb accepted it, and booted with successĬopie the bigfile from the iso volume to your HD Disk (Download example by example)Ĭp /Volumes/CCC./sources/install.wim install.wim The open-source package called wimlib, can also 'optimize' a wim file.

Create bootable usb on mac for pc