I'm trying to burn my Snow Leopard 10.6, a 6.5GB dmg file but it always fails with Burn, I don't have toast so I would like to fine a free way, how can I do?

Can I use the disk utility directly?

I'm using a DVD+R DL 8.5GB

  • What do you actually try to burn it on? Also, what "fails"?
    – slhck
    Jun 10, 2011 at 22:27
  • I've used Burn
    – vitto
    Jun 10, 2011 at 22:30
  • I meant the medium you burn on. Are you sure it's big enough for the disk image? Also, again, what "fails"?
    – slhck
    Jun 10, 2011 at 22:34
  • I'm using TDK DVD+R 8.5GB
    – vitto
    Jun 10, 2011 at 23:02

2 Answers 2


I guess you can just use Disk Utility.app.

  1. Mount the DMG file you want to burn
  2. Open Disk Utility.app
  3. Click "Burn"

enter image description here

But this only works if:

  • your burn medium is not damaged
  • has the right capacity
  • your Mac can write to such a medium

Hold alt and click on the  symbol in the top left menu bar. Then choose "System Profiler". Go to "Disc Burning" and see which formats are listed under "DVD-Write". If you are using a DVD+R Double Layer disk and your Mac does not support burning Double Layer disks, you're out of luck.

You can however "burn" the image onto an external HDD, an iPod or anything of that kind in order to install Snow Leopard from USB.

  • The mac says the disc is not compatible with the image, so is DVD+R not compatible?
    – vitto
    Jun 10, 2011 at 23:07
  • See my updated answer above. Is "DVD+R DL" listed?
    – slhck
    Jun 10, 2011 at 23:26
  • It is a DVD+R 8.5GB DL disk, I think only DVD DL disks has 8.5GB of space. Where I live the DVD-R is impossible to buy in some shop, so I made a try with DVD+R but I think it in the + my problem.
    – vitto
    Jun 10, 2011 at 23:34
  • Is your Mac able to burn to DVD+R DL or not? Have you checked in System Profiler?
    – slhck
    Jun 11, 2011 at 0:06
  • I've read it's not a mac problem but a DVD+R incompatibility with Leopard DMG. I must buy a DVD-R dual layer 8.5GB to burn the DMG.
    – vitto
    Jun 11, 2011 at 11:26

Yeah, to burn the DMG correctly with Disk utility, I've used DVD-R instead of DVD+R.

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