A DMG (Disk Image) app is a type of application packaged within a disk image file with the extension .dmg. This format typically contains one or more individual applications in the form of .app files, which can be deployed on macOS devices through the Intune admin center.
A DMG file should be understood as a distribution medium for applications rather than an installer itself. It’s similar to the Windows ISO file format. To deploy an application to macOS devices using Intune, you can download the .dmg file for the application from the vendor’s website and create a deployment within the Intune platform.
Not all applications on the internet may have a .dmg file available for download. However, if you have the .app file but not the .dmg file, you can use the Disk Utility application on a macOS device to create a disk image file (DMG).
This can be done by opening the DMG image file, adding the .app files to it, and then saving the DMG. This process allows you to create a distributable DMG file for deployment even when it’s not provided by the application vendor.
Table of Contents
- macOS devices must be enrolled into Intune.
- DMG application max file size is 2GB.
- It requires an Intune management agent on macOS.
For demonstration purposes, I will take an example of Google Chrome App.
While we’re using the Google Chrome application as an example, However, the steps outlined in this blog post can be applied to deploy any other DMG application using Intune. Let’s check the steps:
STEP 1 – Download DMG Installer
You can visit the software vendor’s website to locate the DMG Installer for macOS devices and then proceed to download it. As our Example app is Google Chrome, We will visit the link: Google Chrome DMG app and select DMG from the File type drop-down. Click on Download.
STEP 2 – Create an App Deployment
To create an App deployment on the Intune admin center, follow the below steps:
- Sign in to Microsoft Intune admin center
- Click on Apps > macOS > macOS apps
- Click on + Add to start the creation of the deployment
- App type: macOS app (DMG)
- Click on the Select button to proceed
App Information tab
To get started, click on “Select app package file” to choose the .dmg application installer. Locate the app package file, and then click the “OK” button to proceed.
- Name: Provide a unique name of the application.
- Description: Provide a description of the application.
- Publisher: Provide the publisher’s name.
The remaining information is optional to fill out. Nevertheless, if you have all the details about this application, it can be valuable for other team members to gain a better understanding of the application and could prove useful in troubleshooting any issues that may arise.
In the requirements tab, select Minimum operating system as a condition for application installation. Click on Next to proceed.
In the Detection rules tab, Select Ignore app version to Yes or No based on the below criteria:
- Select Ignore app version = Yes If you want to app to be Installed when it’s not found on the target device. If the app is already there but the version number is different, it will be ignored and the app will not be deployed.
- Select Ignore app version = No If you want to app to be Installed when it is not found on the target device or the app version you are deploying is different than the one already installed on the target device.
Ignore the app version configuration gets a bit confusing, therefore to make it easier I created the below excel matrix for you.
In general, when deploying a self-updating application such as Google Chrome or Zoom, you should set “Ignore the app version” to “Yes“.
Please note that If you have disable AutoUpdate setting for self-updating apps, then can set “Ignore app version” to “No“. I have provided more detail about it in my other blog post: How to deploy Zoom using Intune.Note
In the “Included apps” section, please supply the App bundle ID (CFBundleIdentifier) and the App version (CFBundleShortVersionString) information for the app. To retrieve these details, you can install the Google Chrome DMG file (the same one you intend to deploy through Intune) on a test Mac device and then use the following commands in the macOS terminal to obtain this information:
defaults read /Applications/Google\ Chrome.app/Contents/Info CFBundleIdentifier
defaults read /Applications/Google\ Chrome.app/Contents/Info CFBundleShortVersionString
If you’d rather not use the macOS terminal to gather this information, you can also utilize the Finder app to locate the Info.plist file for Google Chrome. Here are the steps to find this file:
- Go to Finder > Go > Go to Folder…
- Search for /Applications/Google Chrome.app/Contents/ path.
- Double-click on the searched path and find Info.plist file in the Contents folder.
- Double-click on the file and search for
CFBundleShortVersionStringvalues in the file.
- Once you’ve collected all the required information, you can enter it in the Detection Rules tab, click “Next” and proceed.
- Click on Add group to add an Azure AD group containing macOS devices.
Review + create
Review the deployment and click on Create to start the deployment process.
Sync Intune Policies
The device check-in process might not begin immediately. If you’re testing this policy on a test device, you can manually kickstart Intune sync either from the device itself or remotely through the Intune admin center.
Alternatively, you can use PowerShell to force the Intune sync on Windows devices. Another way to trigger the Intune device check-in process is by restarting the device.
Monitor Deployment Progress
You can monitor the application deployment from the Intune admin center by navigating to Apps > macOS > selecting the specific application. The Overview page will display the installation status, similar to what is shown in the screenshot below.
If you face any issues or experience deployment failures, you can click on “Device install status” or “User install status” to access more detailed information about the error description and error code, helping you troubleshoot and resolve the problem.
To check if the deployment is completed successfully, follow the below steps:
- Go to Finder > Go > Applications
- Look for the Google Chrome application icon as confirmation of the deployment.
macOS Intune deployment troubleshooting
If you face any problems when deploying the application, you can check the ‘IntuneMDMDaemon*.log‘ and ‘IntuneMDMAgent*.log‘ files for more information. For guidance on locating these files on a macOS device, you can refer to my previous blog post titled How To Collect Intune Logs From a macOS Device.
In this blog post, we learned how to deploy DMG apps on macOS devices through Intune. We used the Google Chrome application as an example, a widely used application in many organizations. After triggering the device check-in from the Company Portal app, the app installation was completed within a couple of minutes.