I was using Mac operating system in my workplace from a long time and now I am switching from Mac to Windows. The need for the conversion would be more clear from the below queries taken from some forums: Therefore, sometimes this can become the major issue for a user to convert/ extract DMG in Windows. Without Windows, we cannot go through the files in DMG format. So, to read a Mac DMG file in Windows we have to download Windows version of the program with the. As they are Mac installation files and the users cannot install these programs on Windows.