How do I install Clover on usb formatted for mac.

First time trying to hackintosh.. I got a Mac os Sierra bootable installer from a friend. But now I need to install clover on the usb, but windows won't allow me to open the usb without formatting and erasing the installer. Is there any way to do this on windows, or do I have do it on a mac?

submitted by /u/ugotnothing1
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