Disk Utility (Yosemite): Burn a disk image to a CD or DVD
Use Disk Utility to burn a disk image on a recordable CD or DVD disc.
To burn a disc, you need an optical drive in your computer or one connected directly to your computer. You can’t burn a disc using a remote optical drive.
Select the disk image in the sidebar, then click Burn in the toolbar.
Or, click Burn in the toolbar, then select a disk image in the dialog that appears.
Insert a recordable CD or DVD disc into the optical drive, then follow the onscreen instructions.