High Sierra generally supports Macs from late 2009 to mid-2017. If your Mac is too new, the App Store may block the download. 2. Create an ISO via Terminal Once the "Install macOS High Sierra" app is in your Applications
Finally, convert the read/write DMG to a compressed, bootable ISO: mac os 10.13 high sierra iso download
Wait patiently. The process can take 15–20 minutes. You will see progress bars indicating "Erasing disk" and "Copying installer files." High Sierra generally supports Macs from late 2009
rm /tmp/HighSierra.dmg
You will see a new volume called "HighSierra" appear on your desktop. mac os 10.13 high sierra iso download