How to make a bootable disc in Yosemite?
Locate the .iso file you want to burn and place it on your Desktop:





Navigate to to Disc Utility (Applications -&gt; Utilities -&gt; Disc Utility)





Once Disc Utility is opened, drag and drop the .iso file into the side panel and highlight the .iso file:





Click Convert located at the top:





Under Convert use the settings of Where: Desktop, Image Format: DVD/CD master and Encryption: none and choose Save:





Drag and drop the .cdr file from your desktop into the side panel and select the .cdr file:





Enter a new disc
Click Burn located at the top and you should be prompted to burn the .cdr to the disc: