I'm running Windows 7 at the moment, and tried PowerISO, then it errored on my dual layer DVD(which sucks, and makes it useless). I also tried TransMac, formatted the USB or something along the lines of having it work on Mac. Also right click and I believe I loaded the .dmg file to make it bootable from USB. But when I went into alt+command+o+f for booting. and typed in "boot ud:,\\:tbxi", it came back with an error, saying it couldn't boot into it or something along those lines. Can anyone give me a recommendation on what I should do? I have 1 dual layer DVD left.