Questions tagged [dmg]

Apple Disk iMaGe file format

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Mount image only for active user

I have an encrypted dmg with private files. When I mount it I see is as drive but when another person opens their users they see the unit available too which I don't want. I even tried changing the ...
Juan's user avatar
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Issues trying to use TransMac to create bootable USB from Windows 10

I'm trying to follow the steps in this post: How can I use Windows to create an OS X El Capitan or macOS Sierra USB flash drive installer from the disk image (.dmg) file downloaded from Apple? Which ...
DaveSmith's user avatar
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Install MacOS X Mountain Lion from Downloadable DMG [duplicate]

I have bought a second hand iMac (mid 2007 version), and the previous owner has erased the hard drive. It does have a recovery partition which offers an install of MacOS X El Capitan. However, this ...
Michael Firth's user avatar
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Mac not letting me install 'Packages" by Stephan Sudre

I am trying to install "Packages", to create an installation package for an App I am developing. After I mount the disk image file, I am trying to start the installation process by launching ...
fibonacci_ostrich's user avatar
2 votes
1 answer
211 views

Does DMG compress free space?

I’m backing up an old Mac SSD and I wondered whether if creating a compressed DMG from that HFS+ disk with Disk Utility will actually consider the free space as zero and therefore compress it ...
gio91ber's user avatar
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Strange Disk Image File (.dmg) problem - deleted files in xyz.dmg do not relinquish file space

Hardware & OS used: Mac Studio M1 Max 32GB mem 1TB SSD Mac OS Ventura 13.2 Mac Mini M1 16GB mem, 1TB SSD Mac OS Ventura 13.2 Mac Mini Intel i7 32GB mem, 1TB SSD, Mac OS Ventura 13.2 Background: ...
fganon's user avatar
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1 answer
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Why does open fail with LSOpenURLsWithRole() failed with error -610

Why am I getting LSOpenURLsWithRole() failed with error -610 when I try to open a .dmg on the command line? user@host Downloads % open buskill-mac-x86_64.dmg LSOpenURLsWithRole() failed with error -...
Michael Altfield's user avatar
3 votes
2 answers
479 views

Cannot install old MacOS from App Store for running 32 bit apps

I want to install an older macOS version in a virtual machine (using Parallels) to run old 32 bit apps. I try to download using this page: https://support.apple.com/en-gb/HT211683 I tried to download ...
AivanF.'s user avatar
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2 votes
1 answer
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Safari can’t open the file “.dmg” because no available application can open it

macOS Monterey 12.5, MacBook Air, M1, 2020 I am pretty sure I was learning how to partition my disk to install Linux and I may have done something with diskutil like unmounting my primary disk. I have ...
Julius H.'s user avatar
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Remove known password from DMG file

I have a few .dmg files of which I know the password. I am easily able to mount them and view the contents. Is there any way to remove the password from the files? From what I see hdiutil chpass is ...
Moulick's user avatar
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How could macOS installer act as both an installer package "InstallAssistant.pkg" and a disk image "SharedSupport.dmg"?

Apple has been providing single file macOS installer package "InstallAssistant.pkg" since Big Sur, this package install the app to "/Applications/Install macOS Ventura.app", and ...
myeyre's user avatar
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Encrypted file image access

I have 3 users on a mac os computer: Administrator user A: Standard Account user B: Standard Account User A should not see User B files. And User B should not see User A files. User A has an ...
Bob5421's user avatar
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6 votes
1 answer
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How can I use Windows to create an OS X Yosemite USB flash drive installer from the disk image (.dmg) file downloaded from Apple?

This question is NOT a duplicate of the question How can I use Windows to create an OS X El Capitan or macOS Sierra USB flash drive installer from the disk image (.dmg) file downloaded from Apple? ...
David Anderson's user avatar
10 votes
2 answers
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How can I use Windows to create an OS X El Capitan or macOS Sierra USB flash drive installer from the disk image (.dmg) file downloaded from Apple?

There are many posts on the Internet where instructions are given for creating OS X USB installers by using the TransMac and other such applications on a Windows machine. Many of these posts assume ...
David Anderson's user avatar
1 vote
1 answer
921 views

Error hdiutil: create failed - File exists -> but the file does not exist until this command fails

Trying to create a .dmg file on an NFS share. % rm -f store.dmg && ls -l store.dmg ls: store.dmg: No such file or directory % hdiutil create -size 300g -fs APFS -volname Temp store....
James Risner's user avatar
8 votes
1 answer
4k views

All of a sudden can't open .dmg files on Monterey

My MacBook Pro 13" M1 crashed last night, I think because I switched off my external USB-C monitor. I logged in as normal but since then I am not able to open .dmg files. When I try to open using ...
Hackeron's user avatar
  • 266
8 votes
1 answer
924 views

Auto-Launch app from the dmg

Is there a way, as soon as a .dmg is mounted, without any user-action the contained .app launches, just like windows has autorun.ini?
Anoop Vaidya's user avatar
2 votes
1 answer
2k views

Is there a way to create a Background image for DMG so that the image will fit any screen?

I'm opening a DMG on a M1 MacBookPro 13" screen (2560x1600) and the background image, which is 740x494, is not fully displayed. Is there a rule of thumb type solution for making sure that when a ...
esaruoho's user avatar
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1 vote
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Shrink disk image to eliminate free space

I created a larger-than-necessary writable disk image, copied content to it, then shrunk the partition with diskutil resizeVolume. This left a big gap at the end of the partition table: MEDIA: "&...
rgov's user avatar
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Why is encrypted volume asking for password on first run only?

MacBook Pro running macOS Catalina. I have a “QuitAllApps.app” automation that quits all open apps, including an encrypted .DMG volume that is opened with different automation. After working great for ...
Gregg Potocnik's user avatar
3 votes
1 answer
3k views

Using hdiutil to create a blank .dmg image in the current directory

As a workaround to this issue, I want to use the hdiutil to create a blank image in the current directory. The settings should be identical to these of the GUI Disk Utility (File > New Image > ...
Foad's user avatar
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Open an Encrypted Folder In Another Mac

I encrypted a folder in a MacBook Pro running Big Sur following this article: https://www.hongkiat.com/blog/encrypt-mac-folder/ Am I able to copy this .dmg file to another Mac and open it with the ...
Krafter's user avatar
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macOS Catalina Retain Path Bar in Mounted Folders

I'm running macOS Catalina, and whenever I download a *.dmg and open it, Finder doesn't show a path bar at the bottom. In older versions of OS X it used to be that the first time I pressed View -> ...
arik-so's user avatar
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Show password of mounted DMG file

I recently created 3 encrypted DMG files using the same password for all of them. Apparently I do not correctly remember the password anymore but one of the DMG files is still mounted. Is it possible ...
macbeth's user avatar
2 votes
1 answer
510 views

How to skip verification of .dmg file located on a network filesystem?

I have a file server (SMB/Samba 4.5.16) in the local network. If I put a .dmg file on it (anywhere) and try to mount it, MacOs will ALWAYS verify it first, which means reading through the whole thing, ...
Olaf Klischat's user avatar
1 vote
1 answer
243 views

Opening a DMG file and switching to it automatically

When I click on a DMG file, finder opens and mounts it. Then I have to search for the new "disk" and select it. Is there a way to open a DMG file and make finder select and show it ...
Duck's user avatar
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378 views

Recover data from DMG image of external drive

I have a DMG file which was created for an external APFS drive using Disk Utility. The DMG file is 250GB. The output from Disk Utility when the DMG was created Reading GPT Partition Data (Primary GPT ...
Nik Barres's user avatar
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1 answer
363 views

Google Drive macOS client can't dowload files inside mounted dmg virtual drive

I'm trying to let Google Drive client to sync files inside mounted dmg. I've added the folder (mounted dmg) to Google Drive client for backup. Everything works fine: upload of new files from my ...
Luciano Denti's user avatar
1 vote
0 answers
64 views

Is there any way to create a disk image where its Finder window will not display the status bar or tab bar?

I'm trying to create a disk image for distributing an application, where it automatically opens a Finder window in icon view with a custom background. (The sort we see used for many applications.) ...
Bri Bri's user avatar
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2 votes
2 answers
2k views

Making an ISO file from an Apple provided DMG file? [duplicate]

I'd like to make a bootable ISO file from Apple-provided DMG file located under Download macOS using Safari on your Mac from: https://support.apple.com/en-us/HT211683. They provide a DMG file with a ...
Meh.'s user avatar
  • 436
1 vote
0 answers
76 views

Trying to restore older Macbook Pro 13 and 15in

Ok so im running out of ideas. i have two macbooks that im trying to restore. They both predate internet recovery and the hard drives were replaced. I do not have any disks for them so im trying to ...
Ed Farr's user avatar
  • 11
1 vote
1 answer
87 views

Launch DMG drive script failing after restart

I have an automation (screenshots of it here: https://www.icloud.com/iclouddrive/0bB-1AiIWdJc1jmkfdjRbsAVA#Launch_Plex_Media_Automation_ )saved as an app in Automator with the following AppleScripts ...
Gregg Potocnik's user avatar
0 votes
1 answer
1k views

Google Chrome dmg wont eject after installation, even though it's not in use

I just bought a MacBook Air M1 (it's my first MacBook so im pretty new to the OS). I downloaded and installed Google chrome, however I'm trying to delete the dmg file but when I click eject or try to ...
Cinthia Abigail's user avatar
4 votes
1 answer
2k views

Is running an app directly after opening .dmg file without installation safer than installing it?

For macos apps downloaded from the Internet, I am kinda paranoid and don't trust most of apps for security reasons, especially I am living in a country which does censorship too much. I think there ...
sgon00's user avatar
  • 2,284
1 vote
1 answer
136 views

Recognize encryption from UDIF

I have created a savings bundle and encrypted it with the standard SHA 2 algorithm with the usual hard disk utility. Can I see the encryption anywhere? They cannot be found in the disk utility or with ...
BabyBoy's user avatar
  • 895
1 vote
1 answer
533 views

burning a multi-session cd into iso

I have a multi-session (osx/windows) cd that I'd like to create an iso from. Is there a way to create a single iso file with all the sessions included in it? Output from diskutil list disk2 is below. ...
JRR's user avatar
  • 157
2 votes
1 answer
568 views

Where is the DMG saved when the hard disk is erased?

Assuming you would go into recovery and format the data carrier on which macOS is installed, where would the DMG be located from which you booted with "CMD + R", because as far as I know it ...
BabyBoy's user avatar
  • 895
0 votes
2 answers
2k views

MacOS Big Sur - how do I disable/ skip verify on opening dmg [duplicate]

I have 2015 MBA running Catalina that at some stage in the past I managed to configure that when opening my own created dmg files (used for business data storage with encryption security) it no longer ...
BM282's user avatar
  • 11
1 vote
0 answers
69 views

macOS recovery signing and checksums

A question that has occupied me for a long time and I still haven't got the answer. It's about Apple's Internet Recovery. When I read through quite a few pages from Apple, I saw that a signed .dmg was ...
BabyBoy's user avatar
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1 answer
6k views

I only see a .pkg file when restoring from DMG in TransMac. What is wrong?

I finally got my hands on a second-hand MacBook Pro (Early 2011). However, the disk is corrupted and doesn't boot, and Internet Recovery proves ineffective as the OS X Lion Setup fails. This is the ...
ElectricalHobbiest's user avatar
0 votes
1 answer
579 views

hdiutil convert -format UDRW not truly editable

Trying to add a single file to an existing ISO I ran into a bit of hiccup I can't see through. Here it is: Having never done it before but encouraged by reading the advice from this question: Add/...
CodeCanoer's user avatar
2 votes
2 answers
2k views

How to tell if dmg file contains universal binaries, i.e. if it has been compiled for arm64 hardware

Can you tell from a .dmg file if it contains arm64 binaries? I've got a Mac mini M1 running Big Sur. I don't want to run apps under Intel, only arm64. I don't even have Rosetta installed, and want to ...
Klas Mellbourn's user avatar
1 vote
0 answers
70 views

How to find and download a specific macOS update name that usually is not available within the apple download website

Every time Apple release a minor macOS X update, for example (Supplemental, or Combo, or Security Update, etc), I usually visit https://support.apple.com/en_US/downloads and I download the dmg file ...
Fabio's user avatar
  • 1,148
0 votes
0 answers
4k views

How do I create a Mac OS install hard drive from InstallESD.dmg

I have the InstallESD.dmg file for Mac OS El Capitain, and external Hard Drive with more than 200 GB. I have no idea how to burn the InstallESD.dmg into the hard drive because I tried to burn it but ...
Soufiane L's user avatar
5 votes
1 answer
3k views

How to create "Drag to Applications Folder" in dmg?

I wrote a piece of software and I host it online as a downloadable dmg file. When the dmg is mounted, you can open it like a regular folder. The user then needs to drag the software from the dmg ...
Jeff's user avatar
  • 313
0 votes
1 answer
248 views

Is there a way to pipe the `hdiutil create` into a raw stream without needing to store it first?

I would like to do something like hdiutil create dest_file.dmg -srcdevice /dev/disk3 | curl -TX - PUT \ -H "Authorization: Token" \ --output /dev/null \ "https://uploadlink....
user321627's user avatar
0 votes
1 answer
291 views

Changed DMG password now it won't open

Hardware: Hackintosh running Mavericks. Problem: I had a DMG where I store (stored...) stuff I obviously wanted to keep private, so I unchecked the "Save in my keychain" option. Some weeks ...
ipodder's user avatar
  • 19
4 votes
1 answer
1k views

How to mount a .dmg file with a different volume name (or modify it once mounted)?

MacOS Catalina, 10.15.6 Given a .dmg file, foo.dmg, I want to be able to attach it so that its contents will be visible in the Finder application under the Locations section with an arbitrary name, ...
Alex Tereshenkov's user avatar
0 votes
1 answer
55 views

Backblaze and similar services not necessary for a small hdd? Upload full disk dmg to cloud services easier?

I understand the usefulness and convenience of a site like backblaze, but if I wanted an offline backup and my drive is under 100gb, would it make sense to just make an encrypted full disk dmg image ...
Toddd's user avatar
  • 61
1 vote
0 answers
792 views

Reinstalling OS X on a Macbook Pro 8,1 (Early 2011) from Linux without Internet Recovery

I've been finding a way to reinstall OS X (or macOS) on the Macbook Pro 8,1 that I've been using. The Macbook has been wiped out to install only Windows 7, and then wiped out again to install Linux. ...
Juliano David Hilario's user avatar

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