Boot Camp error: An error occurred while copying the Windows installation files
Continued Conversation from Boot Camp error: An error occurred while copying the Windows installation files
I ran into this issue trying to install the full version of Windows 10 Pro October 2018 using 10.13.1 Mojave. I’m installing on a MacBook Pro 15 (2016).
I verified the system was fully ready to install. However this error occurred over and over. Finally I decided to push through manually and it worked. The problem is under the Windows 10 ISO under the Sources folder, there is a file called install.wim. This single file is over 4GB and can’t be written to a FAT 32 partition that Boot Camp creates. This is a limitation for FAT 32. Here was how I worked around it.
1. Star Boot Camp like normal.
2. Go to the point of failure where you get the error message.
3. Boot Camp will attempt to roll back the parition, but close Boot Camp so those two new partitions are kept. They are named OSXRESERVED and BOOT CAMP.
4. Use Disk Utility to erase the newly created “OSXRESERVED” partition, and with the erase feature, choose the ExFAT Format. (This format will allow you to write larger files than the FAT 32 format)
5. Manually copy all the contents from the Windows 10 ISO to the OSXRESROUCES volume.
6. Restart your Mac and enter into the boot selector (hold option key while restarting).
7. You’ll see an option called “Windows” to boot from. This is the installer.
8. As you go through the Windows installer, make sure to reformat the “Boot Camp” partition using the installer tool (this is step #4 from this help article Install Windows on your Mac with Boot Camp - Apple Support)
9. For the rest of the process follow step #5 from the above article. You’ll be clicking on the link “install Windows support software manually” (here is the direct link here If Windows Support Software isn't installed after you run Boot Camp Assistant - Apple Support)
I hope this helps! I’m staring at my window screen right now so I’m sure this setup worked for me.
Cheers!
MacBook Pro (15-inch, Late 2016), macOS Mojave (10.14.1), null