Open Disk Utility , select the drive, and erase it with the format Mac OS Extended (Journaled) , naming it MyVolume .
To download the verified macOS High Sierra 10.13.6 full installer, it is best to use official Apple channels to ensure security and file integrity. While Apple provides individual DMG files (like the 10.13.6 Combo Update ), these only work if you already have a version of High Sierra installed.
# Create a blank disk image of 5.8 GB hdiutil create -o /tmp/HighSierra -size 5800m -layout SPUD -fs HFS+J # Mount the blank image to your system hdiutil attach /tmp/HighSierra.dmg -noverify -mountpoint /Volumes/HighSierra # Use Apple's built-in tool to write the installer files sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierra --nointeraction # Unmount the newly created volume hdiutil detach /Volumes/Install\ macOS\ High\ Sierra # Convert the temporary image into a final master DMG file hdiutil convert /tmp/HighSierra.dmg -format UDRW -o ~/Desktop/macOS_High_Sierra_10.13.6.dmg # Clean up temporary storage files rm /tmp/HighSierra.dmg Use code with caution. download mac os high sierra 10136 dmg verified
How to Download a Verified macOS High Sierra 10.13.6 DMG Getting a verified copy of macOS High Sierra 10.13.6 is essential for ensuring your Mac's security and stability. While many third-party sites offer DMG files, the safest and most reliable way to obtain a genuine installer is directly from Apple. 1. Download via the Mac App Store (Official Method)
The official App Store download provides an .app file, not a .dmg . If you specifically need a DMG (e.g., for virtual machines or bootable media), you can create one from the verified .app file: Open Disk Utility , select the drive, and
A DMG file is a digital disk image used by macOS to distribute software. Downloading system files from third-party sites carries significant risks:
If your current Mac is running a significantly newer OS (like macOS Ventura or Sonoma), the App Store may block the download, stating the OS is "too old" for your machine. In this case, you will need to use the Terminal method. The Professional Method: Terminal Commands # Create a blank disk image of 5
Note: Your Mac requires a minimum of 2 GB of RAM and 14.3 GB of available storage space to complete the upgrade.
Apple keeps the High Sierra download page active, but hidden from the standard App Store search function.
Open your web browser (Safari is highly recommended for this process).
Apple provides the macOS High Sierra installer through the Mac App Store and direct disk image downloads for specific versions. Mac App Store (Full Installer): Apple Support Link to open the High Sierra page directly in the App Store. Requirement: You must use the browser for this link to work correctly. "Download"