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In addition, since dd can overwrite any existing file, so you might want to do chmod 444 *.iso so that all. SNSF file can be turned back to ROM by snsfopt command-line tool.
CONVERT DMG TO ISO MAC COMMAND LINE WINDOWS
diskutil eject /dev/disk1 is to eject the disc for some optical drive that won't let you eject manually but requires OS X to eject the disc. File Extract/Convert to ISO on Windows & macOS.It will take a while and you will see the optical drive's light blinking, if the drive has such a light. dd if=/dev/disk1 of=DiscImage01.iso is to create the ISO image in your current directory (which is your home directory if you just started the Terminal app without doing any cd command).use diskutil unmount /dev/disk1 to unmount the drive, and this command doesn't require a sudo and therefore doesn't need the administrator's password.The command will show the name, as well as the size of the disc, and it should be typically 4GB to 8.5GB. Hdiutil convert /path/imagefile.dmg -format UDTO -o /path. Simply launch the Terminal and use the commands below, replacing the path and image file with your own.
CONVERT DMG TO ISO MAC COMMAND LINE MAC OS X
It might be /dev/disk1 or /dev/disk2, etc, depending on whether you have other drives, such as USB flash drive or SD card. Convert Dmg To Iso Ultraiso Converting image files on your Mac is easy thanks to a command line utility included in Mac OS X called hdiutil.
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Nevertheless, you can play it using a program like VLC which doesn't need the keys, since it is able to circumvent the encryption. So if you burn a new disc with this image it will not play on a standard DVD player. But if the disc is copy protected, it contains decryption keys in the lead-in area of the disc which cannot be read directly, and are not part of the ISO image. As mentioned in other answers you can use Disk Utility or dd to create an ISO image of the original disc.