You're looking for information on macOS High Sierra 10.13.6 DMG. Here's what I found:
A DMG (Disk Image) file is a type of file used on macOS to distribute software, including operating system installations. The DMG file for macOS High Sierra 10.13.6 contains the installation files for the operating system. macos high sierra 10.13 6 dmg
As of September 2020, Apple no longer provides security updates for macOS High Sierra 10.13.6. Therefore, it's recommended to upgrade to a newer version of macOS to ensure your Mac remains secure and up-to-date. You're looking for information on macOS High Sierra 10