1. Mount the DMG
Double-click the downloaded DMG file. Inside, you will see Install macOS High Sierra.app. Drag this app to your Applications folder.
2. Format the USB Drive
3. Run the Terminal Command
Once the Install macOS High Sierra.app is in your Applications folder and the USB is named MyVolume, copy and paste this command into Terminal:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Press Return. Enter your admin password. Type Y when asked to confirm. macos high sierra 10136 dmg google drive best
Wait 15-20 minutes. The process will erase the drive and copy the hidden boot files.
This is a common certificate expiration error. Because Apple stopped signing High Sierra, your Mac thinks the installer is broken. To fix this:
You might ask: “Why not just download from Apple?” Here is the reality: Press Return
Therefore, the best solution is a verified DMG file hosted on Google Drive. Why Google Drive?
Not all DMGs are created equal. Here is a checklist to find the best one:
The legitimate macOS High Sierra 10.13.6 DMG should be approximately 5.2 GB to 5.4 GB. macOS Mojave (10.14)
Is the link from a known Reddit user with 10k karma? A trusted tech blog? Or a random Discord message? The best sources are:
macOS Mojave (10.14), Catalina (10.15), and later versions do not run 32-bit apps at all. High Sierra 10.13.6 is the last great OS for users running:
Because the DMG is over 100MB, Google Drive cannot scan it for viruses. You will see a warning: "Google Drive can’t scan this file for viruses." This is normal. Click "Download anyway."