Burning ISO HowTo

Note: To burn most ISOs, you can use Apple’s Disk Utility (Disk Copy in older versions).

Launch Disk Utility (Applications → Utilities → Disk Utility).
If you see the ISO in the left-hand pane, select it.
Click on the Burn button in the toolbar. (If you did not select the ISO in step two, you’ll be prompted to find it.)
Ensure that the “Verify burned data” checkbox is ticked (you may need to click on the disclosure triangle to see the checkbox).
Click on Burn. The data will be burned and verified.

See Burning ISO HowTo for more information