It is usually used to mount an ISO file by making virtual CD/DVD drives. It enables you to open, creates, mount, extract, convert, encrypt, burn and compress CD/DVD image files. What is Power ISO? PowerISO is shareware and advanced CD/DVD image file utility program. You can visit their home page to find more information and download. If you regularly convert these type of files for production or testing environment, then you can consider Power ISO as the best option. It is easy to use as it has the graphical interface. Power ISO is a paid software which mainly built to CD/DVD image files conversion. It is used much like ISO images on Windows platform. Power Iso Dmg File Format Is Invalid Or UnsupportedĪ dmg file extension is used for default disk image format in Mac OS X (macOS) that replaced the older IMG format.