How to expand dmg on Windows?

[vijayk]

I have dmg file of certain program that I downloaded on Windows Computer. This program usually runs from CD. My mac is not booting up and this program will help me boot. But I dont know how do I expand this dmg file on Windows machine so that I can burn it on CD and then inserting this CD will help me boot my mac

[amarlin]

The problem is, once .dmg files are downloaded on windows, I believe they are "no good" anymore (ESPECIALLY those which were meant to BOOT a mac)...even if your mac were working. (If I'm wrong about this, please correct me, someone!!)

What you really need is access to another mac in order to download that image, and burn it from there. If you had another mac, but no cd burner, then you could use the working mac along with hdiudil to convert the image to a format burnable on the PC (and then bootable on the mac), and then transfer it to your PC and boot it.

With only one PC and one mac, however I'm not sure if you have any options (unless you can find an iso version of the boot disk you downloaded, in which case you could burn it from the PC no problem.)

Good Luck!

(btw, the "paradox" was that you need the mac to create the image necessary to boot it! lol)

[oscillik]

Quote: Originally Posted by amarlin The problem is, once .dmg files are downloaded on windows, I believe they are "no good" anymore

not true - i have downloaded many .dmg files on my friends PC and stuck the files on a cd (still as .dmg files) and transferred them over to my Mac. They worked fine.

as for being able to actually burn a disc from the image on a Windows system, I don't think there's an app out there that will do it. There might be something for Linux that'll do it, but as far as I know the only way to burn .dmg files is on a Mac

[amarlin]

Just wanted to note for the record: what I said above about converting .dmg files to versions burnable on a PC (this conversion must be done on a mac) can be performed by entering the following command in the terminal:

hdiutil convert cdimage.dmg -format UDTO -o cdimage.iso

(replacing the dcimage.dmg and cdimg.iso with the appropriate file names, of course).

Just wanted to make that clear for all.

[oscillik]

Quote: Originally Posted by amarlin Just wanted to note for the record: what I said above about converting .dmg files to versions burnable on a PC (this conversion must be done on a mac) can be performed by entering the following command in the terminal: hdiutil convert cdimage.dmg -format UDTO -o cdimage.iso (replacing the dcimage.dmg and cdimg.iso with the appropriate file names, of course). Just wanted to make that clear for all.

ah!!!!!!!

handy!

nice one

[acme.mail.order]

Quote: Originally Posted by amarlin The problem is, once .dmg files are downloaded on windows, I believe they are "no good" anymore

This was true with the OS9 version that created ".img" files. The resource fork was stripped off in Windows and the image became a useless collection of random bytes. OSX ".dmg" files don't have resource forks and travel much better. Still can't mount them in Windows without a Mac emulator.

[Quasi_Mojo]

I was searching the 'Net to see if there was a way to open up a .dmg image file on a Windows machine and came upon this website.

I've come across a solution that I thought I'd share with you as this page came up when doing a Google search for "+windows +.dmg" (not in quotes, of course).

I was informed that Nero could Burn a .dmg file if you forced it to.

And then I got to thinking...

"If Nero could burn it, why shouldn't Daemon Tools recognise it?"
Guess what - It does!

You can mount the .dmg file to a virtual drive using Daemon Tools and then extract the files that way - or just use the virtual drive to access the files. All you have to do is choose "All Files (*.*)" from the "Files of type:" dropdown and then select the .dmg file to mount.

http://www.daemon-tools.cc/dtcc/portal/index.php

And they said it couldn't be done!

[vijayk]

I installed it and mounted image (dmg) but explorer did not show content of this drive anyways then I launched nero and tried to copy entire mounted disc to a CD using copy disc on nero but it failed.

[Raven]

By the way... true that DMGs don't get stripped of their resource fork when put on a PC... Only thing is that to bur it the PC has to open it and translate it (to some extent) to burn the data... SO yes the files would still open on Mac afterwards... but could not be used for a boot cd because resources a re needed when running a boot sequence sicne nothing is there previously...

[Quasi_Mojo]

vijayk,

I don't know what went wrong. It worked for me. Do you have Windows Explorer set up to view all hidden files? Perhaps the files were hidden. Or the downloaded .dmg file was not complete or corrupt.

Try mounting the image using Alcohol 120%.

[acme.mail.order]

What was the original file format of the .dmg file? It could be that the program is mounting the image, but the OS doesn't understand what it sees. UDIF or cd-r master (DOS) should behave reasonably well, HFS won't.

[Warhaven]

Quote: You can mount the .dmg file to a virtual drive using Daemon Tools and then extract the files that way - or just use the virtual drive to access the files. All you have to do is choose "All Files (*.*)" from the "Files of type:" dropdown and then select the .dmg file to mount.

Yes, but unfortunately it doesn't support segmented disk images. Just found that out. I had 718MB archive/self installer which I had to keep in tact, and it just barely didn't fit on a single CD. So I segmented the image, hoping DT would be able to use it. Guess not.

Anyone know if Nero supports segmented images? I'll go and try it out.

[Skettalee]

How about vice versa? Say I use Alcohol 120% to make an exact copy of an image and its a .mds file or whatever I set it as. Is there a way I can turn that kinda file into a .dmg file and then put it on my mac to mount? Thanks in advance!

[wagon]

I'm with #8. May I have more specific directions on which settings to use for burn foreign image in nero?

[Las_Vegas]

Have you tried asking Nero to burn and iso image and select the dmg file directly?

[Zamael]

dmg2iso.pl --> http://vu1tur.eu.org/tools/

.dmg to .iso pearl and win32 binary available...

[NighTalon]

Use isobuster for all the above functions. .DMG and .ISO conversions all possible including burning on Windows XP/2000.

[yellow]

What about a password protected .DMG, can it handle that?

[Codeword]

Quote: Originally Posted by amarlin Just wanted to note for the record: what I said above about converting .dmg files to versions burnable on a PC (this conversion must be done on a mac) can be performed by entering the following command in the terminal: hdiutil convert cdimage.dmg -format UDTO -o cdimage.iso (replacing the dcimage.dmg and cdimg.iso with the appropriate file names, of course). Just wanted to make that clear for all.

I tried this and it added a .cdr extention to the file it made eg:
cdimage.iso.cdr

Can it just strip that last file extention off?

[gbaatard]

I've been going through some issues trying to create Mac compatible CDs on a Windows machine lately...

The following (Windows) programs might help:

TransMac - http://www.asy.com/
* Read and write Mac format CDs, DVDs, hard drives, high density floppy diskettes and most removable drives.
* Create and open file based Mac volume images including most dmg compressed images.
* Burn disk image files (dmg, img, iso, image).
(and lots more)

UltraISO - http://www.ezbsystems.com/ultraiso/
Lets you open, extract, edit and create pretty much any type of CD image including Mac format ones and HSF ones, ready for burning in almost any burning app.

MacImage - http://www.macdisk.com/macimgen.php3
MacImage is an utility to produce hybrid Macintosh/PC (HFS/ISO 9660) CD-ROMs and DVD-ROMs on a PC.
Hybrid CD-ROMs behave like native media on both platforms (PC and Macintosh) and give all users the best possible experience when mounting the CD-ROM on their computer.


All three programs have trial versions available to download, and are under 5mb each.

Good luck!