High Sierra automatically converts SSDs to APFS. To check:
This is typically a language or localization file issue.
Open (found via Finder > Applications > Utilities).
To create a bootable installer, follow these steps:
Double-click the downloaded .pkg file to run the package installer.
If you cannot download the app directly from the App Store, an excellent, safe utility is .
To perform a clean installation (highly recommended), you will need a 16GB+ USB flash drive and access to a working Mac. Method: Using Terminal (Official)
If your Mac doesn't recognize the USB drive in the Startup Manager:
If you are on a newer Mac (Monterey or later) that blocks old App Store downloads, use the Mist utility on GitHub to fetch the full installer directly from Apple's servers.
key during startup. Select "Install macOS High Sierra" from the list of bootable drives. Format the Drive: Disk Utility to format your target drive as (for SSDs) or Mac OS Extended (Journaled) (for older HDDs). Run the Installer:
: A bootable DMG allows you to wipe your drive completely and install a fresh copy of macOS High Sierra, eliminating accumulated system clutter and performance issues.
For those who already have 10.13 installed and just need the final update, you can download the macOS High Sierra 10.13.6 Combo Update directly as a DMG file. 2. Preparing a Bootable USB (Optional but Recommended)
Before downloading the installation files, ensure your Mac hardware supports version 10.13.6. Late 2009 or newer MacBook Air: Late 2010 or newer MacBook Pro: Mid 2010 or newer Mac mini: Mid 2010 or newer iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer Hardware Prerequisites: Minimum 2 GB of RAM (4 GB or more is highly recommended).
Download the InstallAssistant.pkg or the high-sierra direct setup package directly from Apple's software distribution servers.
Once finished, click install if the prompt opens automatically. Close the installer window. The file named Install macOS High Sierra.app will now sit safely inside your /Applications folder. Method B: Extracting the DMG/PKG via Terminal
: The sysin.org blog maintains a comprehensive collection of macOS DMG and ISO images. The macOS High Sierra 10.13.6 (17G66) DMG includes verified SHA256 checksums for security verification:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierraUSB Use code with caution. Press .
High Sierra automatically converts SSDs to APFS. To check:
This is typically a language or localization file issue.
Open (found via Finder > Applications > Utilities).
To create a bootable installer, follow these steps:
Double-click the downloaded .pkg file to run the package installer. macos high sierra 10136 dmg install
If you cannot download the app directly from the App Store, an excellent, safe utility is .
To perform a clean installation (highly recommended), you will need a 16GB+ USB flash drive and access to a working Mac. Method: Using Terminal (Official)
If your Mac doesn't recognize the USB drive in the Startup Manager:
If you are on a newer Mac (Monterey or later) that blocks old App Store downloads, use the Mist utility on GitHub to fetch the full installer directly from Apple's servers. High Sierra automatically converts SSDs to APFS
key during startup. Select "Install macOS High Sierra" from the list of bootable drives. Format the Drive: Disk Utility to format your target drive as (for SSDs) or Mac OS Extended (Journaled) (for older HDDs). Run the Installer:
: A bootable DMG allows you to wipe your drive completely and install a fresh copy of macOS High Sierra, eliminating accumulated system clutter and performance issues.
For those who already have 10.13 installed and just need the final update, you can download the macOS High Sierra 10.13.6 Combo Update directly as a DMG file. 2. Preparing a Bootable USB (Optional but Recommended)
Before downloading the installation files, ensure your Mac hardware supports version 10.13.6. Late 2009 or newer MacBook Air: Late 2010 or newer MacBook Pro: Mid 2010 or newer Mac mini: Mid 2010 or newer iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer Hardware Prerequisites: Minimum 2 GB of RAM (4 GB or more is highly recommended). To create a bootable installer, follow these steps:
Download the InstallAssistant.pkg or the high-sierra direct setup package directly from Apple's software distribution servers.
Once finished, click install if the prompt opens automatically. Close the installer window. The file named Install macOS High Sierra.app will now sit safely inside your /Applications folder. Method B: Extracting the DMG/PKG via Terminal
: The sysin.org blog maintains a comprehensive collection of macOS DMG and ISO images. The macOS High Sierra 10.13.6 (17G66) DMG includes verified SHA256 checksums for security verification:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierraUSB Use code with caution. Press .