Here is a free and open-source tool to write a raw disk image file to a removable device (say USB or flash drive). The tool is named Win32 Disk Imager.

Although .dmg is a macOS disk format, there are a number reasons of why you'd want open them on Windows computers. Here's how to get started.

Now, if your .img file consists of multiple partitions like a system backup then choose the option of Mount partitions as virtual disks else choose Mount entire image as virtual disks. Let the ...

So I thought I'd use the MS Windows 7 USB/DVD installer tool to make a bootable flash drive of the .IMG file. Unfortunately, the tool only works with ISO's not IMG's. Next I tried Win32 Disk Imager.

Archive a folder Open the Disk Utility app that came with your Mac. Choose File then New Image and lastly Image from Folder. Then pick a folder with all of the files you want to save to the DMG.