kees-jan.hermans
Level 1 (0 points)

Q: no mountable file systems in .iso file

I have an .iso file from somewhere that I want to burn on a DVD. This used to work on my macbook - you right-click on the .iso file and the contents of the .iso file get burned to the DVD.

 

Now, however, when I right-click on the file, I get the option to burn the file on a DVD, with the result that the .iso file gets burnt on the DVD's file system. That is not what I want: the .iso file IS the file system, and ITS CONTENTS must be burned to the DVD. When I double click the .iso file, I get the message 'no mountable file systems etc'. Now, before you begin with your inevitable questions: is the power plugged in - are you awake - do you even know what a DVD is - etc, I would like to point out that:

 

This *same* file *can* be mounted and verified as complete by a Linux guest VM on the same machine. SO THE .ISO FILE IS CORRECT.

 

I would like to point that out because otherwise we get a very distracting discussion about the .iso file in question which is not going to be very useful. The .iso file is a normal, correct, .iso container with all sorts of files in it. Other OS-es can handle it. Those files must go on the DVD. But somewhere in migrating to Yosemite, Mac OS seems to have lost this capability. What can I do? Can I troubleshoot this issue somehow? Can I fix it?

MacBook Pro, OS X Yosemite (10.10.5)

Posted on Oct 29, 2015 7:56 AM

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kees-jan.hermans

Q: no mountable file systems in .iso file

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  • by KiltedTim,

    KiltedTim KiltedTim Oct 29, 2015 7:59 AM in response to kees-jan.hermans
    Level 9 (55,751 points)
    Mac OS X
    Oct 29, 2015 7:59 AM in response to kees-jan.hermans

    It's been a while, but I believe you have to use Disk Utility to 'restore' the iso file to the DVD. That or use a 3rd party application like Toast or something to write it to the disk. I know Disk Utility can do it, though.

  • by kees-jan.hermans,

    kees-jan.hermans kees-jan.hermans Oct 29, 2015 8:10 AM in response to kees-jan.hermans
    Level 1 (0 points)
    Oct 29, 2015 8:10 AM in response to kees-jan.hermans

    Hang on. There seems to be a difference. Two different file types get called '.iso's. When I issue:

     

    $ file debian-7.6.0-ia64-netinst.iso

    debian-7.6.0-ia64-netinst.iso: # ISO 9660 CD-ROM filesystem data 'Debian 7.6.0 ia64 1' (bootable)

     

    However, another .iso file says:

     

    $ file debian-8.2.0-i386-netinst.iso

    debian-8.2.0-i386-netinst.iso: x86 boot sector

     

    Both files are handled transparently by the Ubuntu guest OS, both have the same extension, but the file types are actually different. The first type can be mounted by Mac OS, the second one not. Nice one.