Disclaimer: This guide is for educational purposes. Always back up your data before installing any operating system. Why Download macOS High Sierra 10.13.6?

Download macOS High Sierra 10.13.6 Combo Update - Apple Support

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume Use code with caution.

: The installation process will begin. Select your language, agree to the terms, and choose your disk.

If you are planning to install High Sierra on a physical Mac, using a USB flash drive is the most reliable way to do it. A DMG file alone isn't enough to boot a computer; it needs to be "burned" to a drive.

Select your USB drive, click , and format it exactly as: Name: HighSierraUSB Format: Mac OS Extended (Journaled) Scheme: GUID Partition Map Open Terminal (Finder > Applications > Utilities). Copy and paste the following command, then hit Enter :

I can then provide tailored troubleshooting steps for your machine. Share public link

: To perform a clean install, use a 16GB or larger USB flash drive. You can use the createinstallmedia command in Terminal to turn the downloaded app into a bootable installer. 3. Installation Steps