To perform a clean install or create a bootable USB drive, the DMG file is essential.
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
If you upgraded an older Mac with a non-Apple SSD, enable TRIM via Terminal: macos high sierra 10136 dmg install
sudo trimforce enable
Reboot. This preserves the SSD’s lifespan and speed. To perform a clean install or create a
This version introduced Metal 2, which significantly improved graphics performance. sudo /Applications/Install\ macOS\ High\ Sierra
Apple does not keep a public link for High Sierra on the App Store front page. You usually have two options: