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Help with extracting .iso

L

Lukasmacy

macrumors member
Original poster
Apr 7, 2010
30
0
Britian
I have an .iso file, and I need to extract it, inside the iso are two disc images one 4.34GB and one 7.52GB and these files are .iso.dmg.I need to burnt these two images to disc. How do I extract them so that I am able to burn them both to a disc. I need step by step instructions. Thanks
I have Toast Titanium 10 too.
 
I have tried using disk utility but had no success. When I click on the iso it brings up a new window with the two iso.dmg files in there. I need to extract the two compressed iso.dmg's. And then burn them both. When I go into disk utility it shows the first iso.dmg as 4.9GB when it is 4.34GB which will not fit on a dvd-r. It shows in disk utility as Apple UDIF read-only compressed (zlib). But how do I extract it ?
Thanks
 
Lukasmacy said:
I have tried using disk utility but had no success. When I click on the iso it brings up a new window with the two iso.dmg files in there. I need to extract the two compressed iso.dmg's. And then burn them both. When I go into disk utility it shows the first iso.dmg as 4.9GB when it is 4.34GB which will not fit on a dvd-r. It shows in disk utility as Apple UDIF read-only compressed (zlib). But how do I extract it ?
Thanks
Click to expand...

It's possible that you're seeing the 4.9 as a base-10 size, where the 4.3 is a base 2 size. That would explain the reported size difference.

Did you try using the DMG to burn a disc and did it say it was too big?

If you want to see what files are in the DMG files, just double click them to mount the disk images oin the finder.
 
I have burned the 4.3GB iso.dmg file to disc successfully but it shows on the disc and iso.dmg and can't boot from it.
If you want to see what files are in the DMG files, just double click them to mount the disk images oin the find
Click to expand...
When I click on the iso.dmg it opens in a new window and shows the contents of it. I need to somehow get rid on the .dmg off the end of the file, so its just an .iso. Which is why I need to extract them but I don't know how ?
Also yes its showing it as 4.9GB in disk utility so when I click on burn with my 4.7GB disc in it says not enough space?
 
Lukasmacy said:
I have burned the 4.3GB iso.dmg file to disc successfully but it shows on the disc and iso.dmg and can't boot from it.

When I click on the iso.dmg it opens in a new window and shows the contents of it. I need to somehow get rid on the .dmg off the end of the file, so its just an .iso. Which is why I need to extract them but I don't know how ?
Also yes its showing it as 4.9GB in disk utility so when I click on burn with my 4.7GB disc in it says not enough space?
Click to expand...

A .dmg is a .iso, I'm pretty sure OS X just renames them.

You should be able to rename it and burn it.

Also, once you mount the first .iso, it's essentially a disk, you should be able to use finder and copy/paste it to a hard disk.
 
Just copied and pasted the iso.dmg file to disc in finder and renamed it to .iso now writing to disc, see if that works.
 
You seem to be trying to burn the disk image as a file rather than as an image.

Here's a quick tutorial on the correct way to burn a disk image in OS X.
 

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I just followed those instructions it says "The disc inserted does not have enough free space" Yet it does. I really don't know whats going on here. :mad:
 
Lukasmacy said:
I just followed those instructions it says "The disc inserted does not have enough free space" Yet it does. I really don't know whats going on here. :mad:
Click to expand...

The disc image might be intended for a dual-layer DVD, which hold up to about 8.5GB.

EDIT: Also, have you tried mounting the disc images contained in the main ISO to see what the contain?
 
Can that be a problem, if the 4.3GB image is only intended for DL discs, surely if its less than 4.7GB it should work right ?
 
Lukasmacy said:
Can that be a problem, if the 4.3GB image is only intended for DL discs, surely if its less than 4.7GB it should work right ?
Click to expand...

As it is a compressed disc image, it takes up less space as a .dmg than it would when expanded and burnt to a disc.
 
Are you still around

I have downloaded an iso file (and paid for it) from ebits. 2GB file wirelessly so it took 3 + hours. I am using a Mac and the file keeps coming up with the error that it is not recognizable. Not sure if it was corrupted on the download, I have downloaded it 2 other times (once on a different machine - laptop). I have googled and downloaded different programs (Better ZIp and Stuffit). I am a reasonable computer user but not and expert by any means and feeling quite useless. I have been working on this all week and need to use the downloaded videos for a meeting tomorrow and ......... Any help out there in "e-land" will be great.

Thanks
 
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