Create a blank disk image by typing the following command and pressing Enter:$ hdiutil create -size 5700m -volname "HighSierra" -type SPARSE -fs HFS+J ~/Desktop/HighSierra.sparseimage
After getting the .app or .dmg , check integrity:
# Create a blank disk image hdiutil create -o /tmp/HighSierra -size 5600m -layout SPUD -fs HFS+J # Mount the blank image hdiutil attach /tmp/HighSierra.dmg -noverify -mountpoint /Volumes/install_build # Use Apple's built-in tool to populate the image sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build --nointeraction # Unmount the newly created installer volume hdiutil detach /Volumes/Install\ macOS\ High\ Sierra # Convert the temporary image into a final master DMG file hdiutil convert /tmp/HighSierra.dmg -format UDTO -o ~/Desktop/HighSierra.cdr # Rename the extension from .cdr to .dmg mv ~/Desktop/HighSierra.cdr ~/Desktop/HighSierra.dmg Use code with caution.
Please be aware that macOS High Sierra 10.13.6 is an older version of macOS, and Apple may not provide security updates or support for it. If you're using a newer version of macOS, you might not need to downgrade. If you're experiencing issues with your current macOS version, you may want to consider updating to a newer version instead.
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume Download Mac Os High Sierra 10.13.6 Dmg
Type or paste the following command: softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Press .
Follow the on-screen prompts, accept the terms, select your primary drive, and click . Clean Installation using Bootable USB Shut down the target Mac completely. Insert the bootable USB installer into a USB port. Turn on the Mac while holding down the Option (Alt) key. Release the key when the Startup Manager screen appears.
: A video standard (H.265) that enables 4K video streaming and storage using up to 40% less space than previous standards.
Once finished, the installer will launch automatically. Quit the installer ( Cmd + Q ) if you only need the file to create a bootable installer. Method 2: Downloading via Terminal (macOS Big Sur or Newer) Create a blank disk image by typing the
Apple keeps older macOS versions available via direct deep links that do not show up in standard App Store searches.
Download macOS High Sierra 10.13. 6 Combo Update - Apple Support. Apple Support Download macOS High Sierra 10.13.6 Update - Apple Support
: For users on non-Mac systems or needing an archived DMG, the Internet Archive hosts a 10.13.6 DMG file (approx. 4.9 GB). 2. System Requirements
Open (Finder > Applications > Utilities > Terminal). If you're experiencing issues with your current macOS
Set the Name to MyVolume (this makes the command line step easier).
Many Macs (e.g., late 2009 through 2011 models) cap out at High Sierra. Dual Booting: Running a legacy OS alongside a newer one.
This is a frequent error triggered because Apple's original security certificates for High Sierra expired years ago.
Download the file using the official Apple Server link: Download macOS High Sierra Installer Package. Open the downloaded .dmg file.
Finally, rename the file extension from .cdr to .dmg . You now have your official High Sierra DMG! Creating a Bootable USB Installer