Right Click on USB device -> Format with disk image and select your disk image.File -> open -> select your dmg/iso file.Finish!: Congratulations! Now you have a bootable USB media… please if it won’t work by selecting F12 at boot prompt, modify the BIOS to boot the USB before everything!.Start: Click on Start and wait until it finishes ( for 4.5 GB it takes about 3/5 minutes….).Device: Select your device to install it on.Bootabling : Click on Open and select your DMG or ISO file then click on tools->Create a bootable USB.Installing: Install PowerISO, it’s crack.Downloads: Click here to Download PowerISO with crack.There are many ways to Create Bootable USB mac osx installer, but I am going to explain only useful information here.