Etcher was stuck on my Mac and can not complete the burning process
The above advice is very out of date and no longer applicable to your situation. You are experiencing issues due to how Microsoft changed their installation methods as of Windows 10 v 1803. The WIM files are larger than what the FAT filesystem supports. The Microsoft tool is already aware and works magic when writing an iso to let this happen. The developer of Rufus is also aware and was able to hack together a solution that requires disabling secure boot while installing.
Thanks, Microsoft…
Anyways, Etcher (or any other software/terminal DD on Mac) follows protocols and errors out while trying to write a file larger than the file system allows. Also...