Before downloading, ensure your Mac is compatible. High Sierra generally supports the following: At least 2GB (8GB recommended for better performance). Storage: Minimum 14.3GB of available space for the upgrade. Models: MacBook (Late 2009 or newer) MacBook Pro/Air (Mid 2010 or newer) iMac (Late 2009 or newer) Mac mini (Mid 2010 or newer) How to Create a Bootable USB
file, you must manually create a bootable media or a disk image for clean installations. Create Bootable USB: Format a USB drive (at least Mac OS Extended (Journaled) createinstallmedia command in Terminal: download macos high sierra 10136 dmg mac top
Paste the following command exactly (works for High Sierra 10.13.6): Before downloading, ensure your Mac is compatible
Apple keeps a secure, signed link for High Sierra 10.13.6 for enterprise and support use. Copy this URL into your browser (do not use a download manager): Models: MacBook (Late 2009 or newer) MacBook Pro/Air
Use Disk Utility to format an 8GB+ drive as Mac OS Extended (Journaled) with a GUID Partition Map . Name it MyVolume .