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)
Remember to always back up your data before any major OS installation, and verify the integrity of any downloaded DMG files with checksums when available. macos high sierra 10136 dmg install
If you have a compatible Mac running an older OS, you can pull the installer directly from Apple: Follow the prompts; this will install the OS yet
Steps for DMG containing installer app:
h3 font-size: 1.4rem; font-weight: 600; margin: 1.5rem 0 0.8rem 0; color: #1d1d1f; Follow the prompts