How to Create Bootable MacOS Installation ISO

Channel:

i12bretro

Subscribers:

14,400

Published on October 29, 2021 9:00:31 AM ● Video Link: https://www.youtube.com/watch?v=i_o9mWuaEtk

Game:

The Elder Scrolls Online (2014)

Category:

Tutorial

Duration: 2:16

638 views

14

#MacOS #Installation #ISO

Full steps can be found at https://i12bretro.github.io/tutorials/0631.html

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Things You Will need
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   - An existing MacOS Device or VM
   - 30-40 GB of free disk space
 
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Creating the Bootable .iso
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   01. Download the MacOS install from the Mac App Store
    NOTE: the easiest way to find them is to use a search engine, for example:
    macos monterey site:apps.apple.com
   02. Click the Get button
   03. Wait for Software Update to find the update
   04. When prompted, click Download
   05. Wait for the download to complete
   06. Once the download completes, quit the installation if its starts
   07. Start LaunchPad from the dock
   08. Search terminal ≫ Click Terminal to launch it
   09. Run the following commands in terminal, altering the MacOS Installer name as needed
         # create temporary disk image, make sure its larger than the downloaded installer
         hdiutil create -o /tmp/macOS -size 15000m -volname macOS -layout SPUD -fs HFS+J
         # mount the temporary disk image
         hdiutil attach /tmp/macOS.dmg -noverify -mountpoint /Volumes/macOSISO
         # use createinstallationmedia utility to copy files
         sudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia --volume /Volumes/macOSISO --nointeraction
         # unmount the temporary disk image, alter the OS name as needed
         hdiutil detach -force /Volumes/Install\ macOS\ Monterey
         # convert the disk image to .iso
         hdiutil convert /tmp/macOS.dmg -format UDTO -o ~/Desktop/macOS.cdr
         # change the extension from .cdr to .iso
         mv ~/Desktop/macOS.cdr ~/Desktop/macOS.iso
 


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