Installing Dmg On Mac From Terminal

DMG files are mounted by your system, like a sort of virtual hard drive. When you’re done installing the application, it’s a good idea to unmount the DMG in Finder when you’re done installing: just click the “Eject” arrow. Then you can feel free to delete the original DMG file: you don’t need it anymore. How To Mount Dmg File Terminal 1; How To Mount Dmg File Terminal 4; If you want to script the install it requires a few more steps since the name of the.dmg file, the name of the Volume created, the name of the application, and the name of the device that needs to be detached can all be different. Plus they can have spaces in them.

This guide deals with 3 ways of making a boot disk from macOS, the first one is the fastest and is done via the Terminal from a command in macOS called createinstallmedia, the other 2 are older ways are done with a mixture of finder using Disk Utility and command line.

Mount the Mac OS installer to get.DSStore, BaseSystem.chunklist, and BaseSystem.dmg. Download and install a.dmg file from Mac OS terminal. I created a bash piece of code that downloads a.dmg. To create a bootable macOS installation disk, you have to burn the DMG file to a USB drive as CD/DVD is not available for Mac computers. Here's how to do it from text commands and using a purpose-built software called WizDMG. You will first need to download the DMG file for the macOS version you wish to install.

The first way can support macOS Big Sur, macOS Catalina, macOS Mojave or macOS High Sierraand further back to SIerra, El Capitan, Yosemite and Mavericks.

Quickest Way

Download the macOS version you need but don’t install.

Attach your USB stick/drive.

Launch the Terminal from /Applications/Utilities and enter the command below and then your password when prompted, be sure to change the ‘Untitled‘ name in the below command to your external disk name:

Let it do its thing and there you have it, one bootable macOS drive.

This really is a super simple way – however if using the Terminal fills you with fear and dread, there are some GUI apps that can get the job done namely DiskMakerX and a new imaging tool that can clone a new disk very quickly – AutoDMG, although AutoDMG can not work with macOS Big Sur

Alternative Ways of building a Bootable macOS Disk.

An alternative way to make a boot disk of macOS (but not macOS Big Sur), first of all, get the app or download via the App store, if downloaded it will file in the folder Applications.

The example below uses OSX Mavericks.

Control / Left click Options, Show in Finder to get to the app, don’t install at this stage.

Located in the Applications Folder

Finding the InstallESD.dmg

To find the actual InstallESD.dmg file, control/left click the ‘Install macOS’ app and choose show contents – then navigate to Shared Support folder.

Control/Right click to show contents

Navigate to Shared Support folder to see the InstallESD.dmg file

Mount InstallESD.dmg

Double click to mount the image.

Make Invisible Files Visible

We need to see the BaseSystem.dmg inside the InstallESD.dmg

Crank open Terminal and run:

This will show all invisible files have a look inside the mounted InstallESD.dmg

Mount an External Disk

Attach a USB/external drive – this guide uses the external drive name called BootDisk, you need to make sure the format is correct, it needs to be Mac OSX Extended Journaled – if it’s not you can format that in Disk Utility.

Launch Disk Utility

Launch Disk Utility as found in Applications/Utilities and go to the Restore tab.

Drag BaseSystem.dmg to the Source field and your external disk to the Destination and click Restore.

This will mount your new macOS external disk and name it OSX Base System – but we need to add the packages.

Fix the Packages

Couple of things to fix in the newly created boot disk, remove the Packagealias at System/Installation/ folder

Now from the previously mounted InstallESD.dmg copy over the Packages folder to the same location where we just removed the alias above.

Will take a while as it holds all the install packages.

Job done now you can boot from the OSX 10.9 disk.

Make the Visible back to Invisible

If you want all to return back to normal and hide the system files run a couple more commands in the Terminal

Installing Dmg On Mac From Terminal Download

How to create the OSX 10.9 Mavericks Bootable Drive just via Terminal

Install Dmg From Terminal

Just for the crazy ones……after Mavericks is downloaded….and again this assumes you external disk is named BootDisk

Mount the InstallESD.dmg buried deep in the app

Swap to the newly mounted image

This puts you back in the Finder in front of the newly mounted InstallESD.dmg, go back to Terminal and clone the BaseSystem.dmg to the remote USB drive

This will change ‘BootDisk‘ to ‘OS X Base System‘

Remove the existing Packages alias link from the newly restored image

Copy the full OSX Mavericks Packages over to the new image….takes a while

And there it is! – to eject the new bootable USB OSX Mavericks 10.9 disk ‘cd’ to home and eject

Now you can boot up from your newly bootable disk and either Install OSX10.9 on another device or use the Terminal/Disk Utility or Firmware Password Utilities on another device.

When you download an app or a piece of software on your Mac, the file is usually downloaded as a DMG file. DMG files serve as containers for apps in macOS. You just need to double-click the downloaded DMG file, drag the app to the Applications folder, then unmount the installer. This way, the installation process has been simplified and users don’t have to suffer the hassle of installation wizards that are plaguing Windows users.

Although the installation process sounds simple, it is much more complicated than that. The contents of the DMG goes through a checksum process to verify that the file is 100% intact and that it hasn’t been tampered with. Once the file has been verified, it is then decompressed. DMG files are designed for macOS and you can’t run them on Windows devices.

DMG files make app installations on macOS a lot quicker and easier. However, there have been several reports from users about the .dmg file not opening on Mac. There are different versions to this error, but the end scenario is the same: for some reason, users are unable to open the .dmg file on Mac. This guide will discuss why some users have trouble opening a DMG file and how to resolve this issue.

Unable to Open .DMG File on Mac

Installing a DMG file on Mac should be as easy as double-clicking the file and dragging the app to the Applications folder. However, the process is not as smooth for some Mac users because they are not able to open the DMG file to start with. According to user reports, the download process was completed and there were no issues with unzipping. But when it comes to opening the unzipped files, nothing happens. Some users who encounter this issue get the resource temporarily unavailable error while others noted no activity happening no matter how many times the file is clicked.

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Others encounter this error message when opening the DMG file:

There is no default application specified to open the document.

When the user tries to open it, either the options are grayed out or nothing happens when any of the options are clicked. This error has caused the affected Mac users to be frustrated. The users who encountered this error tried to redownload the file using a different Mac and the DMG file seems to be working fine, which means that the problem lies with the device itself. But what causes DMG files to not open on Mac?

Why Your .DMG File Is Not Opening on Mac

Some users noted that they cannot open the .dmg file on Mac after updating to Catalina, but there are also those who encountered this error when running an older version of macOS. This means that the problem is not unique to Catalina but it is something that affects the entire macOS system.

Here are some of the possible reasons why some users are having trouble opening DMG files:

• If your Mac is running Catalina, check the version of the app you are trying to open. Catalina no longer supports 32-bit apps. So if you’re trying to download and install a 32-bit app, then you might not be able to install it on Catalina.
• If you have poor or unstable internet connection, it is possible that the file was not downloaded completely, resulting in errors when accessing the file.
• If you downloaded the file from an untrustworthy source, it might be a fake DMG file or it could be loaded with malware.
• It is also likely that the DMG file you downloaded is corrupted. An interrupted download process and malware infection are the two leading causes of file corruption.

Hence, before you start the troubleshooting process, here are some things you need to consider:

• Download the file once again using a different internet connection. Try using a wired connection if possible.
• Scan the file for malware infection, especially if the file was downloaded from an untrustworthy source.
• Download the file from another source. If the app is not available on the Mac App Store, visit the developer’s website and download the installer from there instead.
• If you’re running macOS Catalina, make sure that you are downloading the 64-bit version of the app.

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How to Open .DMG File on Mac

If you’re having trouble opening the DMG file on Mac, here are some of the things you can do:

Method #1. Use DiskImageMounter.

1. After downloading the DMG file, right-click or Command + click on the file.
2. Choose Open With from the menu, then select DiskImageMounter.
3. Depending on the size of your file, you should see the mounted Disk Image appear on your Desktop.
4. If you don’t see the Disk Image, choose Other from the right-click menu.
5. Navigate to /System/Library/CoreServices/DiskImageMounter.app
6. The DMG file should now be mounted.

Method #2. Mount the .DMG File via Terminal

If the right-click menu is grayed out or nothing happens when you click any of the Open With options, you can try mounting the file using Terminal instead. Drag the file to the Desktop and follow the steps below:

1. Open the Terminal app by going to Finder > Applications > Utilities.
2. In the Terminal window, type in the following command and press Enter: cd ~/Desktop
3. Next, type in this command, then press Enter: hdiutil attach filename.dmg
4. Replace filename.dmg with the actual .dmg file name.
5. After executing the two command lines, your .dmg file will now be mounted on your Mac.

Method #3: Use a Third-Party Tool.

If you cannot open the DMG file using the two methods above, you can try using a third-party utility instead. Here are some of the apps you can try:

How To Install Dmg On Mac Using Terminal

Summary

Installing applications on macOS is a lot simpler compared to installing programs on Windows, thanks to the DMG file. However, it is normal to run into errors when opening a DMG file, especially if the file has been corrupted or has not been completely downloaded on your device. If this is the case, you can try any of the three methods listed above to open the problematic DMG file.

Installing Dmg On Mac From Terminal Server