How To Create an ISO image with files and folders on Mac OS X

Sometimes I want to create an iso image so I can use with Windows OS and burn to a DVD if I need to on Mac OS X El Capitan 10.11.4. I documented this so I can use it later. 1. Use diskutility to create a blank image of 4.6GB = 4600MB (most DVD is 4.7GB).       2. Open the test_image.dmg and copy files and folders until it maxed…