Here's what I want to do. I wish to create a windows 7 universal disk by deleting a file within the iso image. Now when I double click on the iso image, it mounts as read only. I need it to mount as readwrite. So either a command line command or a software would help solve my problem. Here's the command I tried- hdiutil mount -readwrite /path to dvd.iso The command went through but the disk still mounted as a read only!