2 Replies Latest reply: Feb 20, 2011 6:48 PM by coachwpb
coachwpb Level 1 (5 points)
I have read dozens of posts on this going back to '05, and am no more clear on what exactly I can or cannot do here.

I have a DVD of a software app that I want to backup in case I lose or damage my primary one. It's software runs on both mac and windows so I want it to be able to load on both, just like the master DVD does. Here's what I've done so far:

1. Go to Disk Utility
2. Click "New Image"
3. Image Format > CD/DVD Master
4. Encryption > none
5. Burns the .CDR file.

I can mount the CDR file on my mac. All good.

I can burn a DVD from the CDR image and it also loads on the mac. All Good.

I cannot load that DVD on my Windows machine.

I copied the CDR file to my windows laptop, renamed to .ISO, burned with Roxio. The resulting DVD would not load on the windows machine either.

Is there something I can do to make the image copy only one time in such a way that I can use it to reburn to a blank DVD that will load on Windows and Macs, just like the original did?



iMac, Mac OS X (10.5.8)
  • William Bothwell Level 2 (255 points)
    Clicking on the 'New Image' icon in the Disk Utility window gives you a limited set of options for creating a disk image of a CD or DVD, none of which will duplicate the ISO 9660 (Windows) half of a hybrid Mac/PC disk. It is possible to do what you want with Disk Utility, but the process of creating the disk image is somewhat different from the one you've been following.

    Here's how to do it:

    With Disk Utility running insert the CD or DVD disc you want to copy in your optical drive, and select it in Disk Utility's list of disks and volumes on the left side of the Disk Utility window.

    Ignore the 'New Image' icon in the Disk Utility window and instead go to the menu bar at the top of your screen and select 'File > New > "Disk Image from 'name of disc'."

    Type a name for the disk image.

    Choose "read only" from the Image Format pop-up menu.

    Click Save.

    After Disk Utility creates the disk image, eject the original CD or DVD.

    Select the disk image in the list of disks and volumes on the left side of the Disk Utility window, and choose 'Images > Burn…' from the menu bar at the top of the screen.

    When the Burn Disc dialogue appears, insert a blank CD or DVD, and then click Burn.

    That should create a byte for byte copy of a Mac OS (Extended)/ISO 9660 CD or DVD that will work in both a Mac and a PC.


    Message was edited by: William Bothwell

    Message was edited by: William Bothwell
  • coachwpb Level 1 (5 points)
    THANK YOU That worked perfectly! I've been wrestling with this one for a while. Much appreciated.