How to create macOS sequoia bootable ISO image?

This article / video describes the process to convert macOS Sequoia installer.app to macOS Sequoia ISO image that can be used to install macOS 15 into unsupported devices such as old MACs or laptops.

( macOS sequoia iPhone mirroring )

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.
macOS Sequoia is currently in beta version and is expected to be released to the public in the fall of 2024. So the only way to download macOS Sequoia is to download the developers version until the public release. 

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.

​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 macOS Sequoia 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 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.

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