Skip to content

Instantly share code, notes, and snippets.

@coolaj86

coolaj86/create-bootable-installer-for-macos-high-sierra.sh

Last active June 20, 2023 22:30
Show Gist options
  • Save coolaj86/399b451723c9dfa2ba8d2c3ee13b83cc to your computer and use it in GitHub Desktop.
Save coolaj86/399b451723c9dfa2ba8d2c3ee13b83cc to your computer and use it in GitHub Desktop.
Download ZIP
How to create a bootable macOS High Sierra Installer from MacOS. See https://bootableinstaller.com
Raw
create-bootable-installer-for-macos-high-sierra.sh
####################################################################################################
# bootableinstaller.com #
####################################################################################################
set -e
set -u
# Create an empty 5200m+ volume
hdiutil create -o high-sierra -size 5500m -volname "Install macOS High Sierra" -layout SPUD -fs HFS+J
# Rename since this isn't a compressed disk image
mv high-sierra.dmg high-sierra.img
# Mount the empty disk image
hdiutil attach high-sierra.img -noverify -nobrowse -mountpoint '/Volumes/Install macOS High Sierra/'
# Create the installer image
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --nointeraction \
--volume '/Volumes/Install macOS High Sierra/'
# Detach the installer
hdiutil detach '/Volumes/Install macOS High Sierra/'
# This is already in the correct format
mv high-sierra.img high-sierra.iso
# Make read-only
chmod a-w high-sierra.iso
# Many thanks to https://support.apple.com/en-us/HT201372
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment