Both official methods download a .app file, not a .dmg file. If you specifically require a standard .dmg disk image for deployment or virtualization, you can build one manually using Terminal. Step-by-Step Instructions: Open . Create a blank disk image by running this command:
| Model | Minimum Compatible Version | | :--- | :--- | | | Late 2009 or newer | | MacBook Pro | Mid-2010 or newer | | MacBook Air | Late 2010 or newer | | Mac Mini | Mid-2010 or newer | | iMac | Late 2009 or newer | | Mac Pro | Mid-2010 or newer |
Set the Format type to (or Mac OS Extended Journaled if you are using an older mechanical hard drive instead of an SSD). download+macos+high+sierra+10136+dmg+mac+install
softwareupdate --fetch-full-installer --full-installer-version 10.13.6
Optional: Select to erase your internal drive for a clean install. Select Install macOS from the main utilities menu. Click Continue and accept the software license agreement. Choose your target internal hard drive. Click Install and let the automated process finish. Troubleshooting Installation Errors Solutions for common issues encountered during setup. "This copy of the Install macOS application is damaged" Open Terminal in Recovery mode. Both official methods download a
If you already have a version of High Sierra and just need the 10.13.6 update files, Apple provides direct DMG downloads:
Creating a bootable USB drive is a preferred method for many as it allows you to perform a clean installation of macOS or install the OS on multiple computers without re-downloading the large installer each time. Below is a step-by-step guide that covers both the terminal method for intermediate users and a third-party tool for beginners. Create a blank disk image by running this
Enter your admin password and wait for the process to finish.
How to Get the macOS High Sierra 10.13.6 Installer (DMG/PKG)