Every ISO i attempt to "Burn to Disk Image" using finder (under Catalina) fails with the following message:
Could not burn "whaver.iso". The disk image is invalid.
For what it's worth, the ISO is a valid disk image, but Catalina doesn't seem to understand that.
How is this supposed to work?
I have exactly this problem-- I was trying to burn a Linux ISO and it just doesn't work-- my guess is that it tries to mount it and fails.
However, I found this article http://osxdaily.com/2015/11/22/burn-disc-images-os-x-finder/ and it worked for me:
hdiutil burn ~/Path/To/DiskImageFile.iso
I have exactly this problem-- I was trying to burn a Linux ISO and it just doesn't work-- my guess is that it tries to mount it and fails.
However, I found this article http://osxdaily.com/2015/11/22/burn-disc-images-os-x-finder/ and it worked for me:
hdiutil burn ~/Path/To/DiskImageFile.iso
It does work, but for some reason the process has become very unntuitive.
Use the finder and double click on the iso file to mount it.
From the file menu within the finder you will find an option to burn. Select it.
I just got off the phone with a senior Apple engineer and they have confirmed that this is a known issue with Catalina and they are working on it. In the meantime, the workaround is to go to Terminal and use this command:
hdiutil burn <filepath>
I know you said Finder, I got it to work in terminal which I hope is close enough.
type:
hdiutil burn ~/Path/To/DiskImageFile.iso
in the command line.
I was able to get it to work after doing some more research.
Thats it, and it worked for me with out a issue.
The operating system will mount Apple, FAT, exFAT, and NTFS filesystems. It has never known how to mount Linux filesystem content. So, the message that you report is correct.
The old command-line .iso to mounted device burn that I have used in the past was:
sudo dd if=/path/to/.iso of=/dev/rdiskn bs=1m
where rdiskn is the CDROM or USB stick device name.
I have not tried UNetbootin or Etcher on Catalina as had no reason too, and they may not be 64-bit apps.
I've made bootable disks in Catalina, (agreed it should be as simple as right click>burn) but if you mount the ISO image, just click it, then in Finder goto File>Burn that should work?
mmm... I have just discovered this exact problem on macOS Catalina 10.15.3 on a Mac Mini 2014 with a USB Superdrive.
Right click on a bootable iso file, and try to burn it...."The disk image is invalid."
Tried to do a dd to the raw device file of the superdrive. Would not do it! Must be a change at the kernel level!
Then tried the hdiutil that has been mentioned. Seemed to successfully write the file, but that DVD would not boot properly on a PC.
Then suspected the iso file itself even though it's SHA-256 was OK. Tried it on an ESXi VM and it booted fine!
The problem is definitely within Catalina! Not good!!
Just called Apple Support who confirmed it, but no note of a fix yet.
Now I am going to try my USB Superdrive on a Windows 10 PC with Apple Bootcamp drivers....but this should not be this difficult!!!
Come on, Apple!! :)
Use the following command line:
hdiutil burn whatever.iso
just use hdiutil burn path.to.iso
What worries me that Apple did fix that already... seams like CD/DVD burning times are gone ... I mean already i.e. now.
"hdiutil burn whatever.iso"
Yes- I found that this solution did work for non-bootable CDs/ DVDs.
However, I was trying to create a bootable media, actually a Linux installer, and I found that hdiutil did not write the initial boot tracks. Thus, the resultant DVD would not boot, but the rest of the data on it was ok.
I have not yet tried Firewall0010's solution above. Hopefully, it does write the boot tracks!
Please rectify this, Apple!
It is a sad day when I had to reside to MS Windows to simply write a bootable DVD !!
I have used a 3rd party app for mounting Linux file Sustems. Seamless.
Doesn't work for me: I can't even open (=mount) the ISO.
Tried different CentOS and PuppyLinux ISOs - which work fine on other computers, including my Mojave MB Pro, but won't open on my Catalina MB Pro.
I don't have a solution but I am pretty sure it's kernel level. I've tried it on etcher with the same results. The reason I think it's kernel level is because when I tried to "dd" in the command line it gave me an "oprand" error for the iso. Dudes....if it's not broke don't fix it.
The reason I use Mac is because it's a flashy *nix that runs Adobe. Seriously considering an X1 Carbon and getting Adobe to run in a VM. I know it would be a pain but so are the issues with this new OS.
One of the Linux CD images I was referring to above (bionicpup64-8.0-uefi.iso) is a ISO9660 image. Please note that I have no problem burning the same image on my older (2015) Macbook Pro under Mojave, via the "Burn Disk Image" context when selecting the file in Finder. When I do the same on my Catalina MBPro it shows "Could not burn ... The disk image is invalid".
Also notice that the Catalina MBPro will open the actual CD that I burned on the Mojave machine just fine. Thus it's not a matter of Catalina not reading the file system, but it not being able to mount the ISO image.
If you would like to try it yourself - here is the link to the ISO:
http://distro.ibiblio.org/puppylinux/puppy-bionic/bionicpup64/bionicpup64-8.0-uefi.iso
how to burn iso to cd under Catalina with Finder???