folder before you can install it or create a bootable drive. Open the DMG : Double-click the downloaded InstallOS.dmg Run the PKG : Inside, you will find a file named InstallOS.pkg . Double-click this and follow the prompts. This does install the OS; it installs the "Install macOS Sierra" app /Applications Apple Support Community 3. Installation Methods Direct Installation
To install macOS Sierra 10.12, you must first download the official disk image from Apple, extract the installer app, and then either run it directly or create a bootable USB drive Apple Support 1. Download macOS Sierra 10.12 download macos sierra 1012 dmg file install
The DMG file contains a package that installs the "Install macOS Sierra" application into your Applications folder. Double-click InstallMacOSX.dmg to mount it. folder before you can install it or create a bootable drive
softwareupdate --fetch-full-installer --full-installer-version 10.12.6 This does install the OS; it installs the