Burn ISO to DVD in macos 10.15 Catalina

If you are not afraid of the command line, you can burn ISO images from there where the Finder fails. For example, to burn the latest Ubuntu ISO, load Terminal.app, and there you would type the command (in bold; the resulting output is below):

hdiutil burn ubuntu-19.10-desktop-amd64.iso

Please insert a disc:

Preparing data for burn

Opening session

Opening track

Writing track

........................................................................................................

Closing track

........................................................................................................

Closing session

........................................................................................................

Finishing burn

Verifying burn…

Verifying

........................................................................................................

Burn completed successfully

........................................................................................................

hdiutil: burn: completed

You do have a blank DVD disk in the drive, right? Mount the disk image on the desktop and then Control (right) - click on the mounted icon to select "Burn....."

I have noticed an issue as well. I tried to burn a Solaris ISO to DVD and got a message stating the disk image is invalid. This used to work by just right clicking on the image and choosing burn disk image. The weird part is that I could mount it and then burn it, but in reality if you could mount it and burn then you should also be able to burn it without mounting.

Follow this workflow to help assure the best qualty video DVD and save on "coasters":

Once you have the project as you want it save it as a disk image via the File ➙ Save as Disk Image menu option. This will separate the encoding process from the burn process.

To check the encoding mount the disk image, launch DVD Player and play it. If it plays OK with DVD Player the encoding is good.

Then burn to disk with Disk Utility or Toast at the slowest speed available (2x-4x) to assure the best burn quality. Always use top quality media: Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.

Im on the same boat. Ive been trying to burn a bootable FreeBSD install disc and its not letting me. I hope they fix this bug. Its annoying. I cant neither mount or burn it. It tells me its an invalid iso

I submitted a bug through feedback assistant. I have noticed Etcher has problems writing flash drives as well. I finally ended up using dd to write to a flash drive.

I would recommend submitted a bug as well through feedback assistant so that it gets more attention at Apple.

You can get to feedback assistant but using the following applefeedback:// in a browser.

I have this exact same issue, and also with attempting to burn Solaris ISOs to cdroms. Yes, you can burn the mounted ISO disk image from the desktop drive icon when it's mounted, but it looks like it copies the files to the cdrom and doesn't make a bootable cdrom from the image.

Before Catalina this approach worked fine, same MPB 2015, same USB cd burner, right clicking the iso file and selecting 'Burn image to' ... on Catalina this option just closes the menu and nothing happens.

If I can join the thread....... (Im using Catalina 10.15.1 by the way)

I am also trying to burn a Solaris 10 install DVD, I cannot find the option 'save it as a disk image in 'File' menu described by old Toad, or see it anywhere else. That makes no sense.. sorry

Selecting burn the ISO gives the failure message:- Could not burn "sol-10-u11-ga-sparc-dvd.iso". The disk image is invalid.

However An unpacked ISO CAN be displayed then burned with the following procedure: -

Select your ISO image with RHM - Then Right click to 'open with' - select 'Diskmanagemounter.'

This automatically creates a folder containing the Solaris install files (in my case SOL_10_113_sparc)

Now right click on the new folder and select Burn "SOL_10_113_sparc" To Disk (or whatever your folder is called)

Thats it and it works

I can understand your frustration, Oracle instructions make it seem so easy for x86 Intel platforms , however Ive also delved into this and there's a plethora off issues oracle don't tell you unless you pay £790 p/a for support and thats only for platforms specified in their compatibility list. I gave up as Im not clever enough to sort it without assistance.

I can confirm that this Terminal-based hdiutil burn foo.iso works when a DVDWriter has a mounted DVD on the Desktop. It just finds the drive, and burns the iso. I just booted up the Puppy Linux (bionicpup64-8.0-uefi.iso) Live DVD on a 2007 MacBook running Snow Leopard following this command.

This hdiutil burn command seems a likely candidate for an Automator Quick, or Folder action. The former would be accessible from the secondary Finder panel's Quick Actions menu.

I have the same problem as above. I down load a bootable iso file for use in VirtualBox. I burn it to a dvd. VirtualBox says it is a non bootable disc. This has always worked for me before. I loaded many versions of Fedora this way.

Mounting gives access to the content, but burning from the mounted volume does not create a bootable disc. At the moment, ONLY the command 'hdiutil burn <iso file>' results in a bootable image on disc.

Have you tried dragging the iso file onto then titled DVD icon of the blank disc and then Control (right) - click on the disk's icon and select Burn to Disc?