How to create macOS sequoia bootable ISO image?

This guide outlines the steps required to convert the macOS Sequoia installer (Install macOS Sequoia.app) into a bootable ISO image. The resulting ISO can be used to install macOS 15 on unsupported devices, including legacy Mac models and non-Apple laptops.

Apple MacOS Sequoia (macOS 15) is a revolutionary release of macOS, Apple’s integrated Apple intelligence features for the first time. The successor to macOS Sonoma, it was announced at Apple’s Worldwide Developers Conference 2024.

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1st) macOS Sequoia is compatible with these devices? 
macOS Sequoia is compatible with these devices.
1- iMac 2019 and later
2- iMac Pro 2017 and later
3- Mac Studio 2022
4- MacBook Air 2020 and later
5- Mac mini 2018 and later
6- MacBook Pro 2018 and later
7- Mac Pro 2019 and later

2nd) 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 Sequoia ISO image to be used for virtual machine installers using the built-in terminal App commands.

3rd) How to download macOS Sequoia installer ?

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

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4th) How to convert the downloaded macOS Sequoia installer into iso?

​- The process of converting “install macOS Sequoia.app” to a bootable “install macOS Sequoia.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 macOSSequoia using gibmacOS as described above.

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2- Run the downloaded installer “InstallAssistant.pkg” and follow the steps till you get the installer into applications folder called “Install macOS Sequoia.app“

​3- Copy the file called “Install macOS Sequoia.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 (16.5 BG) named “Sequoia.dmg”: –

hdiutil create -o ~/Desktop/Sequoia -size 16500m -volname Sequoia -layout SPUD -fs HFS+J

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

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

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

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

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

hdiutil detach /Volumes/Install\ macOS\ Sequoia\ Beta

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

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

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

mv ~/Desktop/Sequoia.cdr ~/Desktop/Sequoia.iso

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