If you are downloading the macOS High Sierra DMG to perform a fresh install, you will also gain access to: Best Features of macOS High Sierra
Q: Is it safe to download and install macOS High Sierra from a DMG file? A: Yes, it is safe to download and install macOS High Sierra from a DMG file, as long as you download it from a trusted source like Apple. macos high sierra download dmg install
| Issue | Likely Cause | Solution | |-------|--------------|----------| | “This copy is damaged” | Expired certificate | Set date to 2018 via Terminal: date 010100002018 | | DMG won’t mount | Corrupted download | Re-download, verify checksum | | USB not bootable | Wrong format or Terminal error | Reformat as GUID, re-run createinstallmedia | | App Store redirects | Apple ID never purchased High Sierra | Use direct DMG from Apple’s legacy support page | If you are downloading the macOS High Sierra
Type your password, press Y , and wait 15–20 minutes. : On Macs running macOS Catalina or later,
: On Macs running macOS Catalina or later, you can attempt to fetch the installer using this command: softwareupdate --fetch-full-installer --full-installer-version 10.13.6 .
