How to burn an iso file in mac

Windows users: You should check out the free ISO Recorder for
similar functionality.
Launch Disk Utility (Applications > Utilities).
Insert your blank DVD or CD.
Drag and drop your .dmg or .iso file to the left pane in Disk Utility.
Now both the blank disk and the .iso/.dmg should be listed.
Select the .iso/.dmg file you want to burn to disc, and click on the
Burn button. A dialog box confirming the destination (your blank
CD/DVD) will appear.
Sit back and wait while your new disc gets written!
All discs burned on the Mac work across platforms; you’ll notice in
the screenshot that I’m burning the Ophcrack Live CD, which is
obviously for use on Windows. This is a great way to back up
software installation .dmg’s to optical disk to free up space on
your Mac’s hard drive.