How to convert a downloaded macOS Sonoma installer to iso image ?

The easy method to make macOS Sonoma ISO image to be used for macOS Sonoma installation into unsupported devices or virtual machines.

Apple macOS Sonoma is a major release of macOS, Apple's operating system for Mac computers. The successor to macOS Ventura, it was announced at Apple's Worldwide Developers Conference 2023 on June 5, 2023. 
macOS Sonoma brings a number of new features and improvements, including:

• Interactive widgets on the desktop
• New slow-motion screen savers
• A new Presenter Overlay for video calls
• Enhanced Safari with new features for privacy and security
• New Messages features, including search filters and the ability to send money
• Improved performance and battery life

macOS Sonoma is currently in beta testing and is expected to be released to the public in the fall of 2023. So the only way to download macOS Sonoma is to download the developers version until the public release. 

1st) What are the macOS systems that can be converted to iso images using this method? 
- macOS Sonoma      (Download).
- macOS Ventura       (Download).
- macOS Monterey    (Download).
- macOS Big Sur        (Download).
- macOS Mojave        (Download).
- macOS Catalina      (Download).
- macOS High Sierra (Download).

In this tutorial I will describe how to create macOS Sonoma iso image to be used for virtual machine installers using the built-in terminal App commands.

2nd) How to download macOS Sonoma installer ?

you can use gibmacos software as described in this video as described in this video.

​3rd) How to convert the downloaded macOS Sonoma installer into iso?

​- The process of converting "install macOS Sonoma.app" to a bootable "install macOS Sonoma.iso" which is very important as Parallel desktop app,  VirtualBox and VMWARE can run macOS installation from "iso" images only.

Carefully follow these steps: - 

1- Download macOS Sonoma using gibmacOS as described above.

​2- Run the downloaded installer "InstallAssistant.pkg" and follow the steps till you get the installer into applications folder called "Install macOS Sonoma beta.app"

​3- Copy the file called "Install macOS Sonoma beta.app" installer from the applications folder into your desktop.
Note: you have to ensure that you have enough disk space for running the full process.

4- Open terminal. using spotlight search type "terminal" and press enter. then start typing the following terminal commands:

5- Command 1: create a dmg container on the desktop of a size (16 BG) named "Sonoma.dmg": -

hdiutil create -o ~/Desktop/Sonoma -size 16000m -volname Sonoma -layout SPUD -fs HFS+J

6- Command 2: mount the Sonoma.dmg container into your device: -

hdiutil attach ~/Desktop/Sonoma.dmg -noverify -mountpoint /Volumes/Sonoma

7- Command 3: Create a bootable macOS Sonoma installer into the created dmg container  (N.B. You must have "install macOS Sonoma beta.app" into your desktop as described before in step 3): - 

sudo ~/Desktop/Install\ macOS\ Sonoma\ beta.app/Contents/Resources/createinstallmedia --volume /Volumes/Sonoma --nointeraction

8- Command 4: detach the created bootable dmg container: -

hdiutil detach /Volumes/Install\ macOS\ Sonoma

9- Command 5: Convert dmg to cdr container: -

hdiutil convert ~/Desktop/Sonoma.dmg -format UDTO -o ~/Desktop/Sonoma.cdr

10- Command 6: convert cdr to the bootable iso image: - 

mv ~/Desktop/Sonoma.cdr ~/Desktop/Sonoma.iso

NOW, you have created  a bootable Sonoma.iso image that can be used with Parallel desktop app,  VirtualBox and VMWARE and other virtual machines.

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terminal commands used to convert macOS Sonoma to iso image