A DMG File (with the DMG file extension) is an Apple Disk Image File (also called a “Mac OS X Disk Image File), and it is basically a digital reconstruction of a physical disc. DMG files are often used to store compressed software installers, so that users will not need a physical disc, which is quite convenient nowadays. Other than compression, it also supports file spanning and encryption, and some of the DMG files might be password protected.
Are you wondering if you can open a DMG File in Windows? Certainly, you can. But you may not actually use anything you see within it.
For example, if a DMG file is storing compressed files like images and videos as well as program installer, you can only extract/open the DMG file by using another program, and you cannot actually execute the program installer like how you do with other Windows applications. If you would like to use the same program in Windows OS, just download the Windows version.
Just because you can extract a DMG file in Windows operating system, or even convert one to a Windows-readable format, does not mean that the things within the DMG file will suddenly become compatible with Window OS. The only way to use the same program or play the same game in Windows is to get the Windows-equivalent version. But if there isn’t one, then neither extracting nor converting a DGM file will be in vain.
That is simple, because DMG files are made for Macs, and they are “mounted” as a drive and treated by macOS as if it were a physical hard drive. You can just doubu-click it to open a DMG file on a Mac and directly view its contents or use any program within the file.