You can use 'dd' to write the image in Terminal. You would need to manually create the correct file system for it to work before copying. iso files contain the filesystem structure which is lost if you simply copy via the Finder, it breaks booting & features that require that partition structure. iso is - if it is for making a bootable OS from Linux or similar Barney-15E's suggestion will fail to work. Good point Barney-15E, I read 'USB drive' & assumed Bebias was talking about a USB external optical drive, it probably isn't the case.īebias, please tell us what the purpose of the. Then copy the files from it onto the USB stick.

Burning is for optical media.ĭouble-click the. You need to right-click on the disk image file itself without mounting it.You don't 'burn' a USB drive, you copy files onto it. But that is not the right way to do it, because it will only burn the individual files within the mounted disk image, not the disk image itself. You can already see this in this thread: iamMacPerson suggested mounting the disk image in Finder first then selecting the “Burn to Disc” option within it. Disk Utility could only burn disk images, not files. I think the reason why people preferred Disk Utility is because it wasn’t possible to confuse file burning with disk image burning like Finder does. You can do this in Terminal directly: hdiutil burn /Path/To/DiskImage.iso You can tell when you right-click on a file: a compatible disk image will be burned as “Burn Disk Image to Disc”, whereas incompatible files will simply be burned as wholes: “Burn to Disc”.ĭisk Utility and Finder use the same underlying application to burn disk images, which is hdiutil. As long as iDVD creates a disk image file (*.cdr, *.dmg, *.iso, etc.) then it will work.

Mac burn iso disk utility el capitan