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

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OS X: do you really need to drag applications to the “Applications” folder?

When you install an OS X application from a .dmg file, it is very typical, when you mount/open the .dmg, to see the application's icon followed by an arrow pointing to the "Applications" folder, a bit ...
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2answers
5k views

Write to .dmg file on Mac OS X 10.6.4

Following steps to update a .dmg file (mounting and Show Contents), I'm unable to write to the folders in the DMG file. Doing a "Get Info" displays a locked padlock and all else greyed out in the ...
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3answers
1k views

How to burn DMGs on a Windows PC?

how can I burn .dmgs on Windows 7? I would like to do it free :)
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1answer
1k views

Backup mounted drive of an image in Time Machine

As a mac user, I'm fairly new but I now find myself using disk images a lot (dmgs and sparseimages/bundles) to organise my files. Mostly encrypted images to hold my private stuff and other images that ...
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1answer
263 views

Why mounting readonly dmg sometimes changes image file

Why some readonly dmg images are changing when mounted and what is changed in them? I mean readonly image, not readonly or locked dmg file.
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4answers
17k views

How to burn rEfit .cdr or .dmg in Ubuntu or Windows?

I don't have Mac OS X installed on my MacBook Pro, but I have Ubuntu and Windows. I was following this website's instructions to boot faster into Ubuntu without a 30 second delay. However I can't ...
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2answers
3k views

DMG mounting warning message says “it may make computer less secure or cause other problems”

When I try to open a DMG file I get this: I'll just transcript the image: There may be a problem with this disk image. Are you sure you want to open it? Opening this disk image may make ...
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1answer
23k views

Prepare bootable Mac OS install usb on Windows

Is there any software out there that can simulate Disk Utility (Mac app) for Windows? I need to reinstall leopard on my Mac because I screwed something up on the current OS. The thing is, the DVD ...
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1answer
953 views

Install iPhone SDK DMG file on iMac but I can't find where any of the programs are located

I just download the iPhone SDK disk image from Apple and installed in on my new iMac (by following these directions: link text). The problem is, I can't seem to find where any of the programs got ...
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2answers
13k views

Mount Mac disk image (and sparse bundle) on Windows or Linux

Is it possible to mount the various disk image formats that Mac OS uses on other platforms? I suppose one problem would be that the file system in that image is usually HFS+. I am specifically ...
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3answers
4k views

Further compression of disk image files

Is there a way to further compress a disk image file created by the disk utility program on macs? I need to fit a 6.5G/5.5G image onto a 4.7G disk.
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3answers
10k views

Mac disk images: any real difference between 'master' and 'compressed'?

When creating a disk image (.cdr or .dmg) from a physical CD or DVD on Mac (using Disk Utility > New Image) one can choose between 'CD\DVD Master‘ and 'compressed'. Apart from the obvious fact that a ...
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1answer
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DMG file editing in Ubuntu

I have a compressed dmg file in Ubuntu. I would like open this file and add 2 files to this system and create the compressed dmg file. I open to doing the same in Windows if its not possible on ...
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4answers
13k views

Windows tools to open encrypted DMG files?

Does anyone know of a tool that will supports encrypted .dmg (OSX disk image) files under Windows?
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3answers
6k views

How do software .dmg files mount or work in OS X?

I am a new Mac user and have an iMac. Coming from the Windows world where everything is installer based, OS X seems to mount .dmg files and run them. I've seen this happen prior to an install and ...
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3answers
2k views

Mac OS X - installing software via DMG vs. *nix command line style

New Mac owner here, but long time Linux user. Can anyone describe to me the differences between installing a piece of software, such as Subversion, from a .dmg image as opposed to compiling and ...
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9answers
43k views

I'm unable to mount a DMG, getting a “no mountable filesystems” error

I downloaded a DMG of some commercial Mac software (CSSEdit) but I found that the DMG wouldn't mount. I tried another image from the same company, and then a number of images I had laying around from ...
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3answers
1k views

Mount a .DMG over the network?

Is it possible to mount a .DMG file that is on an SMB share on the network, or do I have to copy it locally first?
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3answers
95k views

How to convert or burn a .DMG image file on Windows?

What software can be recommended to burn a Mac created .DMG file on a Windows operating system? Ideally it should be free, or at least reasonably priced. Or, as an alternative, an application convert ...