After downloading any HighSierra.dmg, check its SHA-1 or SHA-256 checksum. For the official 10.13.6 installer, the SHA-1 hash should correspond to known Apple-signed values (available on Apple’s security forums).
macOS High Sierra (version 10.13) is often considered one of the "golden" versions of macOS. It was the last version to support 32-bit apps fully and introduced the Apple File System (APFS) to the masses.
While Apple has stopped displaying High Sierra in the main App Store search results, the installer is still available—provided you know where to look. Whether you need to reinstall an older Mac, set up a virtual machine, or create a bootable USB drive, obtaining a legitimate DMG or installer file is essential.
Here is your guide to safely downloading macOS High Sierra 10.13.6.
Downloading macOS High Sierra 10.13.6 DMG for Mac is still entirely possible through a combination of Apple’s legacy support page, Terminal conversions, and trusted archiving sites. The key is to prioritize security: stick with Apple’s CDN when possible, verify checksums, and never run unsigned installer packages from random forums.
Whether you are reviving a vintage Mac Pro, running legacy music production software, or simply prefer the skeuomorphic charm of High Sierra, having a verified 10.13.6 DMG on hand ensures you can always go back to one of Apple’s most stable and versatile operating systems.
Have a working download link or a better method? Share your experience in the comments below—but remember to respect copyright and only share official Apple sources.
Last updated: 2026 – This guide follows Apple’s software distribution policies. macOS High Sierra is provided as-is, and no longer receives security updates. Use at your own risk, ideally on an offline or isolated machine.
To download macOS High Sierra 10.13.6, you can use official Apple links or community-driven archives. Note that while Apple provides update files as disk images (.dmg), the full installer is typically distributed via the Mac App Store as an application. Official Apple Download Methods
App Store (Full Installer): For the complete OS installation, use the official App Store link. This downloads "Install macOS High Sierra.app" directly to your Applications folder.
Support Downloads (Updates Only): If you already have High Sierra and just need the 10.13.6 specific update file, Apple offers these as direct .dmg downloads: macOS High Sierra 10.13.6 Update (For 10.13.5 users).
macOS High Sierra 10.13.6 Combo Update (Can update any version of 10.13.x to 10.13.6).
Terminal Command: If you are on macOS Catalina or later, you can download the full installer through Terminal by typing:softwareupdate --fetch-full-installer --full-installer-version 10.13.6. Alternative Sources
If the App Store link is unavailable for your device, third-party mirrors host the full .dmg for archival purposes. Use caution when downloading from non-official sources: Download macOS High Sierra 10.13.6 Update - Apple Support Download macOS High Sierra 10.13. 6 Update - Apple Support. Apple Support download macos high sierra 10.13.6 dmg mac
macOS High Sierra 10.13.6 full installer - Apple Communities
How to Download macOS High Sierra 10.13.6 DMG for Mac MacOS High Sierra (version 10.13.6) remains a vital operating system for users with older Mac hardware or those who need to run specific legacy software. Whether you are performing a clean install, reviving an older machine, or creating a bootable installer, obtaining a reliable macOS High Sierra 10.13.6 DMG is the first essential step.
In this guide, we will cover the official and safe methods to download the installer and how to prepare it for use. Why You Might Need macOS High Sierra 10.13.6
Released in 2018, version 10.13.6 was the final security and stability update for the High Sierra line. It is particularly popular because:
Hardware Compatibility: It supports many Mac models from 2009 to 2011 that cannot run newer versions like Mojave or Catalina.
APFS Refinement: It solidified the Apple File System (APFS), making SSDs faster and more reliable.
Legacy Support: It is one of the last versions to support certain 32-bit applications before Apple moved exclusively to 64-bit. Method 1: Download via the Mac App Store (Official)
The safest way to get the macOS High Sierra installer is directly from Apple. While it is no longer searchable in the App Store, the link remains active on Apple's support servers.
Open the Official Support Page: Navigate to Apple's How to download and install macOS page.
Locate High Sierra: Scroll down to the "Use Safari to download macOS" section and click the link for macOS High Sierra.
App Store Redirection: Safari will prompt you to open the App Store. Click "Open App Store."
Download: Click the "Get" or "Download" button. The file will download to your /Applications folder as "Install macOS High Sierra.app." Method 2: Download Using the Terminal
If the App Store method fails or you are on a newer Mac and want to download the installer for a different machine, you can use the softwareupdate command in Terminal (available on macOS Catalina and later). Open Terminal. After downloading any HighSierra
Type the following command and press Enter:softwareupdate --fetch-full-installer --full-installer-version 10.13.6
The installer will be saved directly to your Applications folder. How to Create a Bootable USB Installer
Once you have the installer file in your Applications folder, you may want to convert it into a bootable USB drive rather than just keeping a DMG. This is useful for clean installations.
Connect a USB Drive: Ensure it has at least 12GB of space and is formatted as Mac OS Extended (Journaled). Name it MyVolume.
Run the Creator Command: Open Terminal and paste the following:sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Authenticate: Enter your admin password and wait for the process to complete. Converting the App to a DMG
If you specifically need a .dmg file for virtualization (like VirtualBox or VMware), you can use the Disk Utility tool: Open Disk Utility. Go to File > New Image > Image from Folder.
Select the "Install macOS High Sierra.app" from your Applications folder.
Choose "Compressed" as the format and save it to your desktop. Safety Warning
Avoid downloading macOS DMG files from third-party "mirror" sites or torrents. These files are often tampered with and may contain malware or compromised security certificates. Always use the official Apple links or Terminal commands to ensure the integrity of your operating system.
Downloading and Installing macOS High Sierra 10.13.6 Whether you need to revive an older Mac or create a bootable installer for troubleshooting, obtaining macOS High Sierra 10.13.6 requires specific steps because Apple has transitioned most legacy downloads to the Mac App Store. 1. Check System Compatibility
Before downloading, ensure your Mac supports High Sierra (10.13.6). Official Apple Technical Specifications list the following compatible models: Apple Support : Late 2009 or newer MacBook Pro : Mid 2010 or newer MacBook Air : Late 2010 or newer : Mid 2010 or newer : Late 2009 or newer : Mid 2010 or newer TeamDynamix Hardware Requirements : At least 2GB of RAM. : Minimum 14.3GB of available disk space. Apple Support 2. Official Download Methods Apple primarily distributes High Sierra as an installer via the App Store, rather than a direct DMG file. Apple Support Via Web Browser (Recommended) : Use Safari to open the Official Apple High Sierra Download Page
. Scroll to the High Sierra section and click the link; this will redirect you to the , where you can click "Get" or "Download". Via Terminal macOS High Sierra (version 10
: If you are on macOS Catalina or later, you can use this command to download the full installer:
softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Standalone Updates
: If you already have High Sierra and just need the 10.13.6 patch, you can download the macOS High Sierra 10.13.6 Combo Update directly from Apple Support. Apple Support Community 3. Using Third-Party Tools (DMG Creation)
If the App Store method fails (common on newer Macs that don't support High Sierra), third-party tools can help you fetch the installer from Apple's servers and package it as a DMG. Microsoft Community Hub
macOS High Sierra - Technical Specifications - Apple Support
Cause: Expired certificate. Apple periodically re-signs old installers. If the certificate is older than your system date, you’ll see this error.
Fix:
Open Terminal and set the date back to 2018:
date 0925120018
Then run the installer. After installation, reset the date automatically:
sudo sntp -sS time.apple.com
A DMG (Disk Image) file for macOS High Sierra is a complete, byte-for-byte copy of the installer package, often bundled with essential firmware updates. Unlike the standard Install macOS High Sierra.app (which is a bundle), a DMG is a container file designed for mounting and disk utility operations. It is the preferred format for:
Version 10.13.6 is the last build of High Sierra, incorporating security patches, stability fixes, and driver updates for newer hardware at the time (2018-era Macs).
Apple doesn’t officially distribute High Sierra as a single .dmg file. However, after downloading the installer from the App Store, you can create a bootable .dmg yourself using Terminal:
hdiutil create -o /tmp/HighSierra -srcfolder "/Applications/Install macOS High Sierra.app" -format UDZO
That creates a HighSierra.dmg on your desktop.