Questions tagged [dmg]

Apple Disk iMaGe file format

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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 ...
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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: "&...
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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 ...
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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 > ...
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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 ...
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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 -> ...
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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 ...
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1 answer
140 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, ...
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1 vote
1 answer
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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 ...
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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 ...
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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 ...
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Can't unmount downloaded dmg after running installer from within dmg

I've created an application that has an installer which I package into a dmg. If I mount the local dmg and run the installer I can then unmount the dmg no problem. The issue is when I download the dmg ...
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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.) ...
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2 votes
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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 ...
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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 ...
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1 answer
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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 ...
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207 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 ...
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2 votes
1 answer
1k 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 ...
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1 vote
1 answer
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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 ...
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1 vote
1 answer
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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. ...
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2 votes
1 answer
491 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 ...
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2 answers
1k 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 ...
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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 ...
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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 ...
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1 answer
147 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/...
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2 votes
2 answers
941 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 ...
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1 vote
0 answers
52 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 ...
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510 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 ...
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2 votes
1 answer
533 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 ...
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1 answer
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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....
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0 votes
1 answer
116 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 ...
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4 votes
0 answers
467 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, ...
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1 answer
40 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 ...
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1 vote
0 answers
506 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. ...
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26 votes
2 answers
4k views

How can I place .dmg files away from the desktop?

Every time I install an app, I get a DMG file showing up on the desktop. It looks like this: How do I hide it on the desktop or keep them elsewhere to preserve the aesthetic? When I Control + click ...
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0 answers
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Problem formatting MacBook Pro

I have two Macs, a MacBook Pro of 2006 and an iMac of 2012. The second one is used by my parents for work, the first one by me for studying. The problem was that the laptop was okay but needed a ...
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198 views

Mac .dmg backup, files disappeared?

I was having some issues with my Mac so I booted into recovery mode and made an image of my internal SSD drive to a .dmg compressed format and then saved it to my external SSD. Then I erased the Mac ...
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are disk drill 3 dmg whole system backup images the same as macos disk utility dmg backup images? / would I need to create boot usb to use them?

I have a small and slow ssd on an old macbook, I want to upgrade the ssd one day, but keep my old macbook because I don't have much money and I like it. I have auto time machine backups to a usb and ...
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1 vote
1 answer
162 views

AppleScript: Clicking a button in a dmg file

I am trying to figure out what code will send 2 clicks to open a file in an opened .dmg file using AppleScript in Script Editor. I did create the .dmg file I've been searching for ways to create a ...
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0 answers
2k views

How do i create a OSx bootable USB using windows 10 and where do i find .dmg file?

I have an iMac 2007 20", and its a second hand computer. It was running OSx Lion when I bought it, then I upgraded it to El capitan, After that, I made a big mistake of erasing the data without taking ...
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0 votes
1 answer
35 views

Get error output from an double-clicked app

How can I get the output written to stderr and stdout from an app that has been installed by .dmg, and is opened by double-clicking its app icon in the /Applications directory? (I can see the output ...
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6 votes
3 answers
25k views

Can I delete the .dmg files on my Mac once I install the app?

I have recently noticed that my 8-year-old MacBook is slow when loading webpages, and I started going through my files to get rid of old stuff. After a while, I came across a file called "discord.dmg"....
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1 vote
0 answers
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How can encrypted Apple DMGs be so fast to open?

On remote drive I have an encrypted .dmg and the same files in a gpg encrypted tar file. The DMG opens within seconds, but to access the tar file, I first need to decrypt it, in this 10 minutes, and ...
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1 vote
0 answers
153 views

Install for all users an Application from a DMG

I trying to install with a Bash script an Application like Slack when I create a new Macbook. Connected as the admin user I run those command sudo hdiutil attach -nobrowse /Users/admin/Desktop/post-...
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1 vote
0 answers
62 views

Why do ISO files on Mac OS X created using an app always change the date to 1 January 2001?

I downloaded Keka and the app works well, but when I created a test .iso file from some photos saved on an iPhone (a copy of the folder I placed on the Desktop), I noticed this unusual thing: The ...
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3 votes
3 answers
308 views

Can I attach a .dmg without mounting the drive that it is sitting in?

I have a .dmg sitting on an external drive (which also contains other data). The .dmg is an image of a failed drive so I can't mount it but I want to attach the .dmg without mounting the partition it ...
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2 votes
1 answer
512 views

Possibly opened a malicious .dmg file on my Mac, not sure wether it installed itself?

I was opening a document on my computer and double tapped the file below it; A (more than probable, malicious) Skype.dmg file, likely downloaded from a popup. Normally, when I see them I send them ...
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1 answer
6k views

How to restore a disk image to source disk using Disk Utility?

I've created a .dmg using Disk Utility from a 32 GB source drive. Now I'm back in Disk Utility in order to restore this disk image to the very same source disk it was created from. I thought it would ...
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  • 1,589
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1 answer
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Is there a way to disable dragging (drag-n-drop) in a read-write dmg file?

I´m creating a dmg image that should be able to use drag-n-drop of a folder onto an application. The user installs my app by dragging a folder onto an application (.app) that is made by Automator ...
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0 answers
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I downloaded Java and DocFetcher, but they try to open in Calibre

I downloaded Java and DocFetcher online, but they downloaded as dmg files and when I try to open them, they try to open in Calibre, an e-book software program. What am I doing wrong?
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