In Mac OS X, we can easily to burn ISO disc Image by using the built-in Disk Utility.
Below are the steps:
- Insert a blank disc.
- Start Disk Utility.
- From the File menu, choose Open Disk Image and select the ISO to be burned.

- In the list of volumes, you will now see an item representing the ISO file. Select it.

- Click the Burn button and follow the instructions.
Done