*.dmg is a disk image file format widely used on Macintoshes for software distribution.

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Made a .dmg for a project; user can't open it - “no mountable file systems”

We don't know a great deal about Macs. We had to make an installer, and were told to try a .dmg So we put together version 1, and it seemed to work. We had one application file, which had our icon, ...
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159 views

Not enough space in dmg file

I created a password protected dmg file (http://www.hongkiat.com/blog/encrypt-mac-folder/) but when I try to add content to the mounted dmg file I receive a 'not enough space' message. I have enough ...
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251 views

Is it possible to shrink DMG images?

I just did some data recovery on a failing hard drive. I have a 1.5 TiB DMG image of the hard drive. I don't have enough free space to simply copy the files elsewhere, and I would like to extract them ...
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375 views

Suggestions? Password & Encrypted Read/Write File like a Mac (.dmg or .SparseBundle) also R/W on Windows, Ubuntu

For years I have used .dmg or .sparsebundle (Encrypted and Password Protected) to safely keep home directory backups on my Mac. Now, I am looking for a similar Full Permissions/Read/Write that ...
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1k views

Trying to restore a Mac OS X system from DMG file fails

I'm in a bit of a panic at the moment. My MacBOok was hanging and generally misbehaving so I decided it was time to do a clean install. I took 2 backups: Time Machine (happens anyway, but I ensured ...
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1k views

Mac OS 10.7 DMG files don't pop up anymore?

Has anybody noticed that double-clicking on a DMG file no longer raises the mounted image to the front of all windows? It used to be that when you double-clicked a dmg file, it would pop-up but now ...
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636 views

Restore damaged boot sector

After a series of unfortunate events, I have a clone of my laptop's hard drive as a .dmg file (created using dd). The dmg was built using the noerror option, which means that significant portions of ...
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487 views

Can't unmount dmg. Keep getting “Resource Busy”

"Workspace" is an encrypted dmg where I keep my code. I don't usually unmout it but I need to take a backup and it's refusing to let me unmount: mark@mark-macbook-air /Volumes$ lsof | grep Workspace ...
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226 views

How can I prevent Mac apps from deleting a temporary folder that they have created?

I'm using an app called DropDMG to extract a large zip file that is 109 GB in size. However once it's extracted the whole bundle, it ends with an error from its subprocess ditto and deletes the ...
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How can I find what type of encryption my DMG is using?

I have an encrypted DMG file on my Mac. Is there any way to use Terminal, and maybe the diskutil command to list what type of encryption the DMG is using? Or perhaps some other command? Or maybe ...
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How can I recover data from a dmg that cannot mount?

I backed up a hard drive in a dmg, then reformatted the hard drive. (I had deleted the efi partition before which was preventing me from reinstalling the operation system). When I tried use the ...
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Strange background image when opening DMG in Mountain Lion

Whenever I open a DMG file to install an application the window opens with a background image from another program I recently installed (Aptana Studio). Below is a screenshot in which I have opened ...
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235 views

restore a DMG to a disk using ubuntu Live CD

I need to restore a drive from a backup I have on a DMG, but currently I can only boot the computer from a Ubuntu CD. Can I restore the backup to a drive this way?
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144 views

Determine exact size of DMG to hold data

Let's say that I have three files with the following sizes: FileA: 15468bytes FileB: 3874235bytes FileC: 10452326bytes and I want to create a UDIF, GPTSPUD, HFS+ DMG with hdiutil which will ...
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649 views

How to clone DMG image to another partition, or USB partition?

Hackintosh probably is not welcome in here, but question is about cloning DMG image to any partition on HDD or USB drive... I know that there's TRANSMAC software, but this one wants to format full ...
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Retrieving data from Disk Utility Image

I created an image of my mac using disk utility. It's a .dmg. It has a lot of data on it (about 1 TB) and I only want one file from it. Is there any way I can selectively pull information from it, ...
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How to make a disk image file from a DVD on Windows that OSX can mount?

Question is pretty clear. Is there a software can do this or is there any other tricks? I tried making an iso file with MagicISO Maker but in OSX i got "no mountable file systems" error. Explanatory ...
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How to compress 2 (apple) disk images of different backups of the same drive?

So I have backed up my Macintosh HD at different instances to DMG files. I would like to compress them but when I try to make an archive it simply compresses each image, without recognizing the ...