macOS High Sierra 10.13.6 DMG — What it is, why it matters, and how to use it

  • Lightweight & stable

  • APFS conversion

  • Still useful for offline installs

    • High Sierra introduced the Apple File System (APFS) for SSDs. Version 10.13.6 represents the most polished, bug-free version of that initial transition. It supports HFS+ (for spinning hard drives) and APFS (for SSDs) seamlessly, giving users flexibility that later OS versions removed.

    | Aspect | Rating (out of 10) | |--------|--------------------| | Stability | 8 | | Security | 2 | | App support | 3 | | DMG usability | 5 (due to certificate expiry) | | Overall for daily use | 1/10 | | Overall for legacy/offline | 7/10 |

    Bottom line: The macOS High Sierra 10.13.6 DMG is a historical tool, not a daily driver. If you must install it, use it offline only and don’t connect to any network. For modern use, upgrade to at least macOS 10.15 (Catalina) or newer.

    The latest version of macOS High Sierra is . While Apple no longer provides official security updates for this OS, you can still download the installer to restore older Mac models or create bootable media. Apple Support 1. Download the macOS High Sierra Installer

    Apple still hosts the High Sierra installer, but how you access it depends on your current setup: Via Mac App Store (Best for Compatible Macs): Use the direct Mac App Store link

    to open the download page. This will download a file named "Install macOS High Sierra" to your Applications Via Web Browser (DMG Format):

    If you cannot use the App Store, Apple provides disk image (.dmg) versions for certain older releases. You can find the 10.13.6 Update (1.88 GB) or Combo Update (2.49 GB) on the Apple Support Downloads The .dmg file from Support pages is often an

    (requiring 10.13.5) rather than a full OS installer. For a fresh install, use the App Store method. Using Terminal (macOS Catalina or later): Open Terminal and run:

    softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Apple Support 2. Create a Bootable USB Installer

    Once you have the "Install macOS High Sierra" app in your Applications folder, follow these steps to create a bootable drive:

    How I Downloaded macOS High Sierra in 2026 (Even on Older Macs)

    macOS High Sierra 10.13.6 is the final version of the High Sierra operating system. While there are no "new" feature updates as of 2026, you can still download the original DMG and late-stage security patches from official and archival sources. Official Download Links

    Apple continues to host installers and updates for older systems: macOS High Sierra 10.13.6 Update : Standard update for users already on version 10.13.5. macOS High Sierra 10.13.6 Combo Update

    : Recommended if you are coming from an earlier version of High Sierra (e.g., 10.13.0). Mac App Store Link

    : Use this to download the full installer app, which can then be used to create a bootable DMG or USB. Apple Support Key Version Details macOS High Sierra | Specs, reviews and EoL info - InvGate

    However, as of November 2020, High Sierra is no longer officially supported and does not receive security updates.