Re: Writing a windows.iso to a usb flash drive

When I've had to do this, I usually just have the originator (e.g., MS Media Creation Tool) write the file directly to the USB in the first place, precisely to avoid issues like this.

You might try a "cloning" utility, such as Carbon Copy Cloner or the cloner tool in Drive Genius.

> On Jul 25, 2020, at 9:25 PM, David Schwartz <[email protected]> wrote:
> 
> Maybe Roxio Toast would work.  
> 
> 
> 
> 
>> On Jul 25, 2020, at 9:22 PM, Carl Hoefs <[email protected]> wrote:
>> 
>> I just tried this command:
>> 
>> $ sudo dd if=Win10_2004_English_x64.iso of=/dev/rdisk2s1 bs=1m
>> 
>> It completes successfully, but the flash drive is rendered unreadable by both macOS and Windows. I guess I'll have to give up and buy an el-cheapo Win10 CD on eBay...
>> 
>> -Carl
>> 
>> 
>> 
>>> On Jul 25, 2020, at 6:15 PM, Carl Hoefs <[email protected]> wrote:
>>> 
>>> I am trying to write a .iso file to a USB flash drive to be used to install Windows 10 onto a PC with a blank HDD.
>>> 
>>> I've downloaded the 5.27GB 64bit Windows10.iso file (twice) from microsoft.com, but when I use DiskUtility.app to "restore" the .iso file to the flash drive (formatted as ExFAT & GUID), it always errors out with: "Could not validate source - invalid argument". It sounds like it's trying to parse the .iso file and can't (the .iso isn't corrupted). This is the behavior on both Mojave and Catalina.
>>> 
>>> Is there any other way I can do this on a Mac, or do I have to hunt down another Windows PC?
>>> 
>>> -Carl
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