4.2

Output device: This pop-up menu specifies the device that the
output files will be formatted for. You can choose Hard Drive
to create a disk image (.img) file that you can burn to DVD
media at a later time using the Disk Utility application (available
in the OS X Utilities folder).
Note: The items in this menu are determined by your
system’s available options. For example, when no Blu-ray or
DVD drive is detected, only the Hard Drive option is available.
Layers: This pop-up menu sets the type of disc that will be
created. There are three options:
Automatic: Detects the inserted disc’s type. For Automatic
to work, you must insert the disc before clicking Burn.
Additionally, Automatic always creates a single-layer disk
image when Hard Drive is selected as the output device.
Single-layer: Creates output for a single-layer disc. You
can use this option to treat a dual-layer disc as a single-
layer disc.