Open Terminal and use the createinstallmedia tool provided by Apple.
Insert a USB flash drive with a capacity of . Note: This process erases all data on the drive. Open Disk Utility (Finder > Applications > Utilities). Select your USB drive from the left sidebar. Click Erase at the top. Set the parameters exactly as follows: Name: HighSierraUSB Format: Mac OS Extended (Journaled) Scheme: GUID Partition Map Click Erase and wait for completion. Phase 2: Write the Installer to the USB via Terminal Open Terminal .
Select your internal hard drive (usually labeled Macintosh HD) from the sidebar.
: A command-line script available on GitHub that can download macOS installers directly from Apple and build a bootable DMG or installer app. Internet Archive : A community-uploaded macOS High Sierra 10.13.6 DMG macos high sierra 10.13 6 dmg
While Apple often hides older versions, you can sometimes find them via the Apple Support downloads page. Search for "macOS High Sierra 10.13.6 Update".
Apple officially stopped providing security updates for High Sierra in November 2020. While it is stable, it should not be used for sensitive tasks in 2026.
Many Macs from 2009–2017 are optimized for High Sierra, ensuring the best performance [5.4]. Open Terminal and use the createinstallmedia tool provided
Note: If the App Store says "Open," you may already have an older installer in your applications folder. Move the old one to the trash and try again. 2. Direct DMG Method (For Creating USBs)
It is ideal for MacBook Pro (Mid 2009-2017), MacBook Air (Late 2010-2017), and iMac (Late 2009-2017).
The installer will download to your /Applications folder as "Install macOS High Sierra.app". Open Disk Utility (Finder > Applications > Utilities)
. While direct DMG downloads for full installers were common for older versions, High Sierra is typically downloaded as a "macOS High Sierra.app". Direct DMG Links: Some tech resources like
Type the following command and press Enter: softwareupdate --fetch-full-installer --full-installer-version 10.13.6
The version is the final, most stable update for High Sierra, featuring improved security, AirPlay 2 support for iTunes , and improved file system management [5.3, 5.4]. Why You Need the 10.13.6 DMG File
: Since it has not received security updates since 2020, High Sierra is highly vulnerable to modern exploits and malware .
This version introduced several fundamental shifts in how the Mac handles data and graphics: macOS High Sierra Download - 10.13.6 - TechSpot