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.

On Windows, HFS+ can be read only with the aid of software such as MacDrive or MacOpener; it's possible to run MacOS 8.1 in emulation, but I know of no suitably old software that can open .dmg ...

Neither 7-Zip nor DMG Extractor are the ultimate solution, though. There are some DMG files that 7-Zip, nor other alternatives that we've tried will open.

Here's a baffler: some readers have reported that when attempting to download certain .dmg files, mysterious .exe files are downloaded instead. MacFixIt reader Ira Altschiller writes: ...

If you want to convert an Apple Disk Image (DMG) file to ISO format on Windows PC, you can use the command prompt or free AnyToISO tool.