Yesterday I downloaded a developer preview of the upcoming Mac OS X Lion. As we all know, in Mac the extension of an application is DMG. The DMG or disc image can be mounted directly on a Macintosh computer, but if you are working on Windows you have to convert it into a recognizable format. Since I was using Windows 7, I had to convert the OS X image to an ISO file before burning it on a DVD disc. So here is how you can do that.
Out of the many methods to convert DMG file to ISO, the one I felt most reliable is given below.
Download UltraISO here.
UltraISO is a very small shareware utility. It can be used to convert a wide variety of disc image formats, burn, copy, and create bootable disc from file folders. The software is available as a 30 day trial version. So if you just need to convert and burn one or two DMG files in Windows you can make use of the trial period to do that.
After installing the application click on convert option from the top tabs.
Now as shown in the screenshot select the DMG file as input, and output as ISO or any other standard Windows compatible format.
Insert a blank DVD disc and burn the converted image. That’s it.
Update: There is a better way to convert and burn DMG file in Windows if you already have a disc burning software installed. For that download this freeware. Extract the ZIP file to a suitable location.
Right click and open the DMG file. Windows will prompt a box asking you to select a program that can open the disc image. Direct the explorer to the DMG2IMG executable. Within a few seconds, you will find the converted ISO image in the same folder.
Dear Sir
Thank you very much for this advise. it worked me fine. I was scratching my mind for the solution for the last three days. Pl. keep posting such kind of great tips. Thanks a lot.
Yep its’ working the ISO file I’ve used ! thanx a lot mate!
Didn’t work for me i’m afraid, also tried Power ISO. Am i doing something wrong?
Does not work with UltraISO 9.5.2.2836, convert errors out with message… Invalid or unknown image file format.
Does not work for me either. Like Decker posted, I also get an error “Invalid or unknown image file format” when i point to my .dmg file. I also use 9.5.2 build 2836.
After posting this I found the same issue on the UltraISO forum.
Here is the solution.
Open UltraISO options> GO to configurations and then click on the tab integration.
From the list select DMG extension and hit OK. Now you can convert your ISO file directly to DMG.
converted well… thanx :d
After I convert the .dmg to .iso and burn it to DVD can I then use it on a MAC. I’m try to get Lion from my Windows 7 computer to a Mac Book Pro. Or can I just transfer the .dmg file from my Windows 7 computer to the MAC via a flash drive? I haven’t tried anything yet I was just wondering which is the best route to go before I start. Thanks for any help.
Convert the Lion DMG file (InstallESD) to an ISO file compatible with Windows and burn it to a DVD. Use this media for a clean OS X Lion installation in your Macbook PRO. I did the same, and I’m sure that it will work.
JMAC, I did what John said and it worked like a charm. I have a 2007 Macbook Pro that was running lion. I am selling the laptop so I went CTL+R to enter utilities and erase the harddrive hoping to have it in factory setup mode. Well, I erased the drive and once powered on the laptop was automatically booting into utilities. I tried to do the Netdownload option but after the Apple servers scanned my computer and looked into my account, I received a quick message stating that there wasn’t a Purchase of Lion associated with my Apple ID. The only way that I could get this thing to work was to Create an Install Disk at home or take it to Apple. I took it to the Apple Store here in Maryland but they were jam packed. I got frustrated because I was running late for an appointment. I discovered this site and converted Lion.DMG to an ISO using Ultra ISO and then burned it to a DVD again using Ultra ISO. I inserted the disk into my laptop and from Utilities I selected the “Start Up Disk” the laptop identified the dvd and rebooted back into utilities. From there I selected the “Reinstall Mac OSX” option. Like magic, it worked like a charm.
Can’t convert .dmg Mac os 10.7.4 using UltraISO 9.5.3
i was trying to do this with the mac osx InstallESD.dmg but it would fail regardless of what converter i used. i had to download 7zip and extract InstallESD.dmg which had another InstallESD.dmg inside it. i was then able to convert that dmg file to a img with imgtodmg and ultraiso.
Hey Jon,
Just wanted to say thanks. Followed your advice and it solved my problem.
sir , i tried this but a invalid or unknown file format is that
Thank you dude……
hi i tried the configurations but still can’t convert there no others software?
thanks
Thanks, I was able to convert and run snow leopard on my pc
Doesn;t work for InstallESD.dmg = bad image format errors with both apps.. thanks anyway (lion 10.7.2 dmg)
Using ultra iso i have changed the format to iso and burn it to a dvd. But when I want to installed a fresh copy in my Intel desktop, I cant. It dose not a bootable dvd.
How can I make that image to bootable to take boot from dvd for a fresh installation of MAC OSX Lion.
PowerISO
MagicISO
ISO-BURNER
ImgBurn
ImToo
no one can burn dmg file
so how can i burn this dmg file in Windows….?
use alcohol app to burn img
hey guys i give you one worning and solution.
solution and worning is that first you will copy your dmg file any other place because if you do anything wrong so your dmg file is damage .and ultra iso is very great thing
This worked for me on Ultraiso 9.5.3.2.91. or atleast the .dmg to .iso conversion worked. However the image size is 4.6gb and ultraiso reports total size is 4149gb. Hitting the burn burn with a fresh 4.7gb dvd occurs with an error of “error verifying blocks on media (2321743 needed, 2295104 available).
So im guessing you need eithe a dual layer empy dvd disc. I have drive capable but not the media
Did you manage to burn it to the 4.7gig?
thanks thats working man
Thank you for this post. This was a great help. Struggled and googled for two days until I found your post. Thanks
Did not work for me. TransMac did work though.
After getting errors as well I solved it a completely different way. I copied the dmg file to my usb stick, then put the stick into the laptop and burned it from there. But then of course you must already have a computer with a macos installed =P
Please use MacDrive 9 to mount OSX DMG in Windows and use MacDrive burner to burn mounted DMG to the blank disc as Mac disc. BTW MacDrive is not free so that is the only set back but it could be an essential tool if you have both PCs and Macs in your home.