This will download a file named InstallMacOSX.dmg . Extract the Installer: Open the DMG file. Run the .pkg installer found inside.
Scroll to the section for older versions and select the macOS Sierra 10.12 link. download macos sierra 1012 dmg file install
🚀 If you need specific Terminal commands for different OS versions or help identifying your Mac model, This will download a file named InstallMacOSX
Open and paste the following command: sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/SierraInstaller --applicationpath /Applications/Install\ macOS\ Sierra.app download macos sierra 1012 dmg file install
This does install the OS; it extracts the "Install macOS Sierra" application into your Applications folder. Creating a Bootable USB Installer
If you want a clean install, select Disk Utility to erase your internal hard drive first.