Apple Disk iMaGe file format

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22
votes
2answers
9k views

What is the difference between a “sparse disk image” and a “sparse bundle disk image”?

What are the differences between sparse and sparse bundle disk images?
20
votes
3answers
6k views

When opening a DMG file, how do I get it to open up in front of the windows?

Whenever I download a .dmg file and then open it (usually from the download bar in Chrome), it opens up in the background. Is there any way to get it to open up in front of my window? Edit To ...
17
votes
1answer
2k views

Where is a dmg file mounted?

When I double click a dmg file it's mounted (or so I assume) in the filesystem. I want to explore the dmg file in the terminal for hidden files (like the background for example), but I'm not sure ...
14
votes
2answers
47k views

How can I convert a DMG to ISO on Mac OS X (preferably for free)?

I have medical records within Windows software within a DMG disk image. How can I convert the DMG to an ISO format on Mac OS X? Is it possible to do it within Disk Utility or CLI easily, or do I need ...
14
votes
2answers
3k views

Why can't I open DMG files which reside on a read-only NFS filesystem?

I've discovered a strange problem... if I have disk image files (DMGs) which reside on a read-only NFS share, I cannot open these in Mac OS X 10.7.5. The same files open fine when accessed over AFP. ...
12
votes
2answers
2k views

How to make a .dmg file?

I know how to make a .dmg file but I do not know how developers (Mostly games) create a window where there is the software file and sometimes theres a readme file. When I create, It shows just a ...
11
votes
3answers
5k views

Why are so many Mac downloads a .dmg just that contains a single .pkg?

I've noticed that many downloads are a dmg (disk image) that contains a single pkg file (installation package). Usually the pkg seems to be already compressed since the dmg doesn't reduce the file ...
11
votes
6answers
9k views

Why do I have to drag my new apps into the application folder?

I'm a new Mac user and I've been installing a few different apps for different things. A lot of these use .dmg files. Why exactly do they all expect me to drag the icon into the application folder? ...
11
votes
2answers
7k views

hdiutil convert/rsize resource temporarily unavailable

When trying to convert or resize a dmg image I get the error: hdiutil: convert failed Resource Temporarily Unavailable error or hdiutil: resize: failed. Resource temporarily unavailable (35). ...
9
votes
3answers
9k views

Is there a command to install a dmg

I want to install a dmg file on a remote server. All I have is an ssh access. Since a DMG is a disk image, I tried to mount it, but mount does not seem to recognize its format. file says my dmg file ...
9
votes
4answers
2k views

How can I backup my system to a remote server (AFP, Samba, or NFS share)?

Here's the goal: I have a backup server with a ZFS filesystem with built in compression and snapshots. All our machines backup there nightly with rsync, and then a ZFS snapshot is taken, so we have ...
8
votes
2answers
12k views

How do I create a DMG file from a directory?

I'm trying to add a few files into a dmg. How do I create a DMG file from a directory?
7
votes
2answers
3k views

Why are executables called DMG (disk image) files?

I am not experienced with OSX but I have been using it recently. It seems to me the equivalent of an .exe (executable) in Windows is a .dmg (disk image) in OSX. And you don't install it, you mount ...
7
votes
1answer
378 views

Prevent other users from ejecting (or even seeing) my mounted disk images

I have an encrypted disk image (sparsebundle) where all of my private documents are stored; I mount it to a custom mount point with: mkdir -p /Users/gabriele/MyDocs hdiutil attach ...
7
votes
1answer
117 views

How to “chroot” a terminal inside a DMG?

I'm doing security research and for that purpose I use an SHA-2 encrypted DMG to store the tools and files I work with (containing confidential client info), to protect them from forensic examination ...
6
votes
2answers
3k views

How to make an expanding compressed encrypted disk image?

I'd like the following setup: A DMG file sits on my HD, taking up only the space of the contents, or perhaps only the space of the contents compressed. If I double-click on it, I need to give a ...
6
votes
1answer
245 views

How to change the background of an DMG Software License Agreement dialog?

When I create my own dmg-images, I always attach a software license agreement to them. When I opened the flattened image, I always got the Jaguar "X" in the background of the agreement dialog, where I ...
6
votes
1answer
646 views

auto unmount .dmg if it has not been accessed for a while

Is there a way to automatically unmount a specific volume (mounted from a .dmg/.sparseimage) if it has not been accessed for a specified period? EDIT: This would be especially useful for password ...
5
votes
1answer
5k views

Cannot empty trash after deleting .dmg

So, I downloaded Chrome, and I put it in the Applications folder and from there a shortcut to the applications bar on the bottom of the screen. All is fine, but now there's an icon on the desktop that ...
4
votes
2answers
6k views

Is there any way to crack a password-protected disk image?

I have created a .dmg file with password. Unfortunately I forgot the password and I my Google searches have not resulted in a way to reset the password of this .dmg file. Please help me find a ...
4
votes
1answer
1k views

Set up flash drive with multiple OS X Installers

Working in a tech shop, and being an Apple fan, I deal with ALL the Apple-related products. I'm seeing products from 10.4 to 10.7, and I have made a bootable flash drive from 10.6 (since it's the most ...
4
votes
2answers
5k views

What are “dmgpart” files and what tools can create, merge, or manage them?

I downloaded something that came as three large files: One was a *.dmg (a disk image file, which I expected) and two more were *.dmgpart files, which I haven't happened to see before – I never ...
4
votes
1answer
1k views

Unable to convert dmg to encrypted dmg on Yosemite

When I try to convert a regular (internet downloaded) dmg file to an encrypted dmg (256-bit AES) using Disk Utility on Yosemite it gives me this error message: How do I get this to work on Yosemite? ...
4
votes
3answers
1k views

OSX application shortcut folder in dock and icon updates after installation

Here is the setup: I have the Applications folder right in the dock, which is the default after installation afaik. Now I have a custom build DMG with an application in there which I drag&drop ...
3
votes
2answers
2k views

hdiutil: compact failed – Function not implemented

When compacting a sparse image with the hdiutil compact command, it fails with the message hdiutil: compact failed – Function not implemented.
3
votes
2answers
5k views

Creating a Backup of a Mac hard drive that won't boot?

PowerBook G4 laptop no longer boots. Hooked PowerBook G4 to another running Mac using Firewire and held down the 'T' key on boot up. This is a Mac similar to the one I connected the PowerBook ...
3
votes
1answer
342 views

How to disable dmg autorun?

I have downloaded a dmg file called BaiduYun_2.2.0.dmg, which, on double-click, shows the license agreement window straight away, instead of showing an installation package or an application that can ...
3
votes
3answers
2k views

Removing non App Store apps

I use several apps installed using .dmg files downloaded from other sources rather than direct from the App Store. When I try to remove them through Launchpad, these apps will not show the X button ...
3
votes
2answers
1k views

Drives and dmg's mounting okay but not appearing in the Finder sidebar

Drives and dmg's are mounting okay on my Mac, and I can find them at /Volumes/. However, they aren't appearing in the sidebar in the Finder. What's the best way to start fixing this?
3
votes
1answer
856 views

In Disk Utility, what advantages do “read/write disk image”s have over “sparse bundle disk image”s?

If I want a read/write disk image, then aren't sparse bundle disk images always the way to go? They start at 0 kb in size, and grow to accommodate whatever you add to them, and if you delete stuff, ...
3
votes
1answer
191 views

Finder remounts DMG files that I opened previously

When I mount a .dmg file or open files in my drive (using text editor or other app), the Finder will automatically remount all .dmg images that I used before. For example, I do something in DMG A, ...
3
votes
1answer
198 views

Disk image windows open beneath other windows

When I install software from a .dmg, the verification window pops up, which I suspect is normal. When it's done, though, the Finder window - you know, the "Drag to Applications to install" box - pops ...
3
votes
1answer
307 views

How can I open the .dmg install window on top of everything? [duplicate]

Possible Duplicate: When opening a DMG file, how do I get it to open up in front of the windows? Whenever I open up a .dmg file, it just gets opened, but it stays under everything that I've ...
2
votes
2answers
156 views

Why are some disk images bigger when burned?

I've got a couple of DMGs that should fit on a CD (one per CD) but burning softwares (Disk Utility & Toast) say that they are 2 or 3 times bigger and thus need a DVD. Why is that ?
2
votes
3answers
2k views

DMG mounts but does not auto-open

I have a DMG which I downloaded using Safari. When I double click it, the volume mounts but it doesn't open in a new Finder window. Any idea why this would happen, and how I can fix the DMG so that ...
2
votes
3answers
482 views

.dmg files organization

Today I needed to view the contents of OS X's SDKs, which are published as .dmg's. To my surprise, I discovered that the structure is as follows : The .dmg contains a hidden .pkg files The .pkg ...
2
votes
2answers
714 views

Is there an easy way to update a NetBoot image?

I have a NetBoot image which I use for booting into to do things like disk maintenance and testing new applications without having to install them on my workstation. It's really handy, but I created ...
2
votes
4answers
19k views

Install Ghostscript on OS X 10.9 using DMG file

I want to install Ghostscript on my OS X 10.9 using a valid DMG file, where can i find it?
2
votes
2answers
409 views

Cannot access mounted .dmg over the network in Mountain Lion

I noticed this with TrueCrypt volumes. Before 10.8, whenever I mounted a .dmg on my iMac, I could access it automatically from my mbp over the network with afp sharing. But after upgrading to Mountain ...
2
votes
1answer
2k views

Can I set a password on an existing dmg?

I am just wondering if it's possible to set a password to existing dmg image. There is no such option at Disk Utility.
2
votes
1answer
601 views

What do I do if the disk image data is corrupted?

I am trying to install Sims 3, but it opens a window saying that "The following disk images couldn't be opened because the image data was corrupted." What can I do to resolve this issue?
2
votes
1answer
494 views

Mount a disk image as physical USB drive?

I have an certificate manager ("BankID") that allows me to export certificates from its certificate store. However, for some stupid reason it only allows me to export these certificates to USB drives, ...
2
votes
2answers
2k views

Password protect folder without disk images?

Is this possible? I know you can protect a .dmg file, but is there a more convenient solution, by using a third party application?
2
votes
1answer
71 views

Secure access to data while retaining convenience and performance

I am looking for a convenient solution to the following problem: I have some large data (tens of GB) that resides on the hard drive of a Mac. Access to the data needs to be restricted so even users ...
2
votes
1answer
3k views

VirtualBox: run OS X inside OS X

I am using Oracle VirtualBox to run OS X inside OS X. This entails running OS X on Mac-branded hardware so does not break any license agreements. I am following the instructions on this site: ...
2
votes
1answer
136 views

Unique volname for DMGs

We have a build process that is now doing the common layout for distributed DMGs. This is done in a way that I've seen in many places -- the DMG is attached, then Finder does its job via osascript. ...
2
votes
2answers
555 views

How to set read-only dmg background picture in Mountain Lion?

Until MacOS 10.7, I used to put a png file in a read/write dmg, then I set it as its background picture, then I hided it and converted the dmg to a read-only one. Everything just worked. Now, in ...
2
votes
1answer
71 views

DMG or Package Installer

If I need to download an App, what method of installer should I prefer DMG or Package Installer? Which has greater advantage.
1
vote
2answers
309 views

What is the differences between Dreamweaver_14_LS20.dmg and Dreamweaver_13_LS20.dmg?

I find that there are two versions of Dreamweaver CC for Mac OSX, one is Dreamweaver_14_LS20 and another is Dreamweaver_13_LS20. Can anyone tell me what is the exactly differences between these two ...
1
vote
1answer
30k views

OS X Mavericks: InstallESD.dmg and BaseSystem.dmg

I would like to make a bootable DMG or ISO file with OS X Mavericks on it. I want to then burn this file to a DVD-ROM (or, alternatively, make a bootable USB stick with it). From what I've read, ...