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.

The subject really says it all - A friend of mine has system files stored as Mac .dmg disc image files, her Mac isn't playing ball and we need to get access. Not knowing anyone else with a Mac, I ...

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.