hdiutil detach /Volumes/Install\ macOS\ High\ Sierra hdiutil convert /tmp/HighSierra.dmg -format UDTO -o ~/Desktop/HighSierra.iso

| Reason | Explanation | |--------|-------------| | Virtual machines | ISO is easier to boot in VMware, VirtualBox, or Parallels than the .app installer. | | USB bootable drives | Some tutorials incorrectly claim ISO is required for bootable USB creation. | | Older Mac revival | Owners of unsupported Macs (e.g., 2008 Mac Pro) try patched ISOs like DosDude1’s patcher. | | No access to App Store | macOS High Sierra is removed from the Purchased tab if you never downloaded it before. |

The air is thin where the mountains meet the sky,A jagged line of granite, cold and gray.Beneath the pines, the shadows learn to lie,While silver rivers carve their winding way.