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coolaj86/create-bootable-installer-for-macos-catalina.sh

Last active April 12, 2021 20:29
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How to create a bootable macOS Catalina Installer from MacOS. See https://bootableinstaller.com
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create-bootable-installer-for-macos-catalina.sh
#########################
# bootableinstaller.com #
#########################
set -e
set -u
# Create an empty
hdiutil create -o /tmp/empty -size 8400m -volname "Catalina" -layout SPUD -fs HFS+J
# Rename to .img since this isn't a compressed disk image
mv /tmp/empty.dmg /tmp/catalina.img
# Mount the empty disk image
hdiutil attach /tmp/catalina.img -noverify -nobrowse -mountpoint '/Volumes/Install macOS Catalina/'
# Create the installer image
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --nointeraction --volume '/Volumes/Install macOS Catalina/'
# Detach the installer
hdiutil detach '/Volumes/Install macOS Catalina/'
# This is actually already in the correct format
mv /tmp/catalina.img catalina.iso
# Many thanks to https://support.apple.com/en-us/HT201372
@ipepe
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ipepe commented Oct 8, 2020

I'm not sure if You are author of website: https://bootableinstaller.com/macos/#macos but link there is broken for this file

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coolaj86 commented Oct 24, 2020 via email

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