This is the safest method if you have a Mac that’s logged into an Apple ID that has previously "purchased" High Sierra.
hdiutil attach /tmp/HighSierra.dmg -noverify -mountpoint /Volumes/install_build Use code with caution. Write the installer files to the mounted image:
: Click "Get" or "Download." The installer will download to your /Applications folder as "Install macOS High Sierra.app".
For a more modern, secure, and hassle-free approach, especially if you want to avoid potential issues with corrupt downloads or certificate errors, you can use a dedicated tool like iBoysoft DiskGeeker. This is a disk management utility that includes a feature to download official DMG installers for various macOS versions, including High Sierra.
If you already have a version of High Sierra and just need the 10.13.6 Update Combo Update , Apple provides these as direct How To Create macOS Bootable USB Installer in Windows 11
You now have a raw, bootable installer for macOS High Sierra 10.13.6.
Once you have obtained the Install macOS High Sierra.app (the raw download), turning it into a bootable USB drive is straightforward.
Once you have the "Install macOS High Sierra.app" in your Applications folder, follow these steps to create a bootable drive for a clean installation.
Disclaimer: Always backup your data before upgrading or reinstalling the operating system.
: You can access the macOS High Sierra App Store page directly via a web browser link. This will trigger the "Software Update" tool to download the full installer.
MacOSHighSierra10.13.6.dmg |-- Contents | |-- Info.plist | |-- MacOS | | |-- install | | |-- startosinstall | |-- Resources | |-- Install.app | |-- ...
If you have a compatible Mac, you can download the full installer, which allows for a clean install. Click here to open the macOS High Sierra App Store page .
