In the world of macOS, holds a unique and important place. It is the final operating system for many beloved 2010-era Macs (like the white unibody MacBook and the classic Mac Pro 5,1). It is also the last version to support 32-bit applications without compromise.
If you already have an earlier version of High Sierra (e.g., 10.13.x), you can download standalone DMG update packages: macOS High Sierra 10.13.6 Update (1.88 GB). macos high sierra 10.13.6 dmg download