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		Yes, I was attempting to install the WindowsSupport downloaded via Mac Boot Camp.  After not selecting to install them, WintoUSB was able to complete.
However, the USB does not appear as a Startup Disk or as a boot option when restarting the Mac holding down the option button.
I tried Legacy and VHD.  
Do you have any advice?
	
	
	
	
	
 
 
	
	
	
		
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		03-17-2021, 03:26 PM 
(This post was last modified: 03-17-2021, 03:26 PM by modernmagic.)
		
	 
	
		Its an iMac (27-inch, Late 2013) 3.5 GHz Quad-Core Intel Core i7
and 
Win10_20H2_v2_English_x64.iso
	
	
	
	
	
 
 
	
	
	
		
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		03-20-2021, 05:04 AM 
(This post was last modified: 03-20-2021, 05:05 AM by modernmagic.)
		
	 
	
		The issue was the 2 USB hard drives also plugged in.  One had Apple Time Machine on it and the other is my iphoto library on a Samsung SSD T5.  For whatever reason as long as both are unplugged, then the option boot works and I can select the EFI drive.