problem 1: stuck at "partition disk".
force quit boot camp
then open disk utility.
click partition, delete all other partition (using the - symbol)that bootcamp made. including: OSXRECOVER and BOOTCAMP.
open bootcamp again and try re-install again.
problem 2: An error occurred while copying the Windows installation files
reason: because bootcamp using a 8g FAT32 disk partition to copy windows file, since FAT32 can not support file larger than 4g. any windows file larger than 4g will cause this problem happen.
- use a ISO that have file size smaller than 4g.
- known iso that can not use: 1703 1803 1809 (may work on your computer)
- known iso that can use: none