The legacy of macOS High Sierra (version 10.13.6) is often defined by its role as a "refinement" update, prioritizing under-the-hood stability and foundational technology over flashy user-interface changes. While it is technically obsolete and unsupported by Apple as of November 2020, it remains a critical bridge for vintage hardware and specialized software workflows. The Foundational Shift: APFS and Metal 2
3.2. Mounting and Extraction
Follow the prompts; this will install the OS yet. It will simply place the "Install macOS High Sierra.app" into your Applications folder. 3. Create a Bootable USB (Recommended) macos high sierra 10136 dmg install