Burning disk images to optical media in macOS Sierra
As part of some work I was doing today, I needed to burn an .iso file to a CD. As I have in the past, I opened Disk Utility and looked for the icon for burning a disc only to discover that this option stopped being available as of OS X El Capitan. It is likewise not available in macOS Sierra’s Disk Utility application.
After doing some additional research, it looks like the ability to burn a disc image is now only available through the Finder or by using hdiutil. For more details, see below the jump.
To burn a disk image file to an optical disk on macOS Sierra, use the procedure described below:
1. Select the desired disk image and right-click to bring up the contextual menu.
2. Select Burn Disk Image “Disk Image Name Here” to Disc…
3. If needed, insert a blank optical disk when prompted.
4. If something other than the default settings are needed, click the drop arrow and set your desired burn options.
5. Once the drive is ready to begin burning the disk image to the optical disk, click the Burn button.
6. The disk image should now burn to the optical disk.
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Der Flounder 
What’s a CD? 😛
I’ve had success using Burn, too. I’m not sure if I’ve tried it on 10.12, but it worked OK on 10.11.
http://burn-osx.sourceforge.net/Pages/English/home.html
I was wondering about that. Guessing it is a victim of the decision to make /Volumes not world-writable, Disk Utility etc run as username…
Gosh that’s easy
This option does not create a bootable .iso?
Thanks! This worked. Finally.
Running 10.13.3 on MacBook Pro and an iMac: I have tried this procedure many times without success. I can create a DVD/CD-R Master Image (.cdr file) which appears to be correct, as it has the same size as the source audio CD which is 302.5 MB. The burn message indicates that it ran successfully, but when I reinsert the target disk it says that it is ‘uninitialized’ and ‘not readable’ on this machine, and shows it’s size as 347.4 MB.
I have followed every tech tip on the internet trying to copy my own original music CD’s to CD-R’s (so far ruining at least a dozen of them) … the result is always the same as stated above.
I have tried burning from Disk Utility, from Finder, etc. as well as the procedure listed in this article. I am waiting for some R/W CD’s to arrive so I can try some more… any ideas?
If I am doing something stupid, please be kind! But DO tell me … very frustrating! Thanks!