It was easy to burn Disc Images in Mac OS X 10.10 or older by using Disk Utility. How to Burn Disc Images in Mac OS X 10.11? Here are some quick ways.
Bring Disk Utility 10.11 in Yosemite to El Capitan. We gave this instruction in another topic here.
Burn a Disk Image File (ISO, DMG, etc) from the Finder.
From the Finder window —> File —> “Burn Disk Image (Name) to Disc…”
Using Command Line: Insert a blank DVD or CD, then use the following command line.
hdiutil burn ~/Path/To/DiskImageFile.iso