Before you begin the download, ensure your Mac is compatible with 10.13.6: Late 2009 or newer. MacBook Air/Pro: Late 2008 or newer. iMac: Late 2009 or newer. Mac mini: Mid 2010 or newer. Mac Pro: Mid 2010 or newer. Memory: At least 2GB of RAM (4GB recommended). Storage: 14.3GB of available space to perform the upgrade. How to Download macOS High Sierra 10.13.6 1. The Official App Store Method
: You can still access the full macOS High Sierra installer through the App Store, provided your Mac model is compatible with this OS version. download+macos+high+sierra+10136+exclusive