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Macs can do this right out-of-the-box, but PCs require special software.  Since we do not have this special software you’ll need to use one of the Macs to do this.

Background Info:

A .iso or .dmg file are what are called “disc images.”  They cannot be opened/edited directly but must first be “mounted” by the Operating System.  In the same way you cannot read the contents of a normal disc (ie: CD, DVD) until it’s been inserted and read by the disc drive, you cannot access the contents of a disc image until it’s been double-clicked and “mounted” by the Operating System (or third party software).

To do this on a Mac:

1. Insert a blank CD or DVD into the CD/DVD drive.

2. Open the application "Disk Utility."  To do this, open up Finder.  Open the "Applications" folder and then the "Utilities" folder.  Double click on "Disk Utility."

3. Click "Burn."

4. Select the iso/dmg file you want to burn and click on "Burn."

5. A dialogue pops up.  Ensure "Burn Disc In" is set to "SuperDrive" and click on "Burn."

6. A progress bar comes up.  Wait until this completes.  The disc will automatically eject when burning is complete.  (You can put the disc back in to make sure it all went okay.)