This yields a ready for VMs or old hardware.
If you are using a Mac that officially supports High Sierra (e.g., MacBook Pro 2012, Mac mini 2012, iMac 2013), visit: https://support.apple.com/en-us/HT211683 macos high sierra 10.13 6 iso download
Here, time is slow—a breath, a thousand years,The world below a blur of green and gold.The summit knows no human hopes or fears,Only the stories that the stones have told. This yields a ready for VMs or old hardware
softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Using Mist: If your Mac is too new to download older versions, use the Mist utility to fetch the installer directly from Apple's servers. Microsoft Community Hub 2. Create the ISO File (Terminal) Once the "Install macOS High Sierra.app" is in your Applications folder, use these commands to build the ISO: Create a blank disk image: Microsoft Community Hub 2
When you type into Google, you will find dozens of sites like download-macos-iso-free.com , osxiso.com , or torrent trackers. Proceed with extreme caution.
Note: This downloads an application file (~5.2GB) to your Applications folder. This is NOT an ISO yet.