Uploading a zip with the iso to my iCloud Drive for you too!
This guide will also help you if you have another mac that will let you burn DVD!
1. Insert an empty DVD disc into the optical drive. In the popping-up window, choose Action followed by Open Disk Utility. Then click OK to move on. You can also find Disk Utility in the Utilities folder. Just run Finder and open the Applications folder first.
2. You can put your ISO file to the desktop. Later, drag and drop the ISO file into the left pane. You can see other hard drives in the same list.
3. Click Burn on the top toolbar. The Burn Disc dialog will be activated.
4. Head to the After Burning section. Mark before Verify burned data. Click Eject discto eject your bootable DVD disc safely.
5. Click Burn to save changes and exit the window. Just leave your computer alone to complete the ISO to DVD burning process.