softwareupdate --fetch-full-installer --full-installer-version 10.13.6
Thus, converting the .app file to a .iso is the primary goal of this article.
If you are trying to download from a newer Mac (e.g., macOS Ventura or Sonoma), the App Store may block the download, stating the software is “too old.” In that case, use Option 2. mac os 10.13 high sierra iso download
hdiutil convert /tmp/HighSierra.cdr.dmg -format UTOI -o ~/Desktop/HighSierra.iso 3. Third-Party Sources (Caution Required)
On a Mac, run:
Now that you have a valid ISO, here are three common use cases:
This guide will walk you through everything you need to know—from legal downloading methods to creating your own ISO file safely. macOS Ventura or Sonoma)
shasum -a 256 /path/to/your/HighSierra.iso