Many users are surprised to learn that Apple still hosts a direct download link for the High Sierra installer. This is the safest, most trusted source. However, it is not a simple .dmg ; it is an .app bundle wrapped in a .dmg structure.
Are you trying to create a bootable installer for an older Mac, or do you need to install it on a virtual machine? download macos high sierra 10.13.6 dmg mac
If you have downloaded the application from the links above and need a DMG file for backup or installation on a VM (Virtual Machine), follow these steps: Many users are surprised to learn that Apple
Then run the installer. After installation, reset the date automatically: most trusted source. However
Apple still hosts the High Sierra installer, though it is hidden from standard App Store searches.