sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/SierraUSB --applicationpath /Applications/Install\ macOS\ Sierra.app Use code with caution. Press .
Here are a few tips and tricks to keep in mind when installing macOS Sierra 10.12:
But there is one complication: Apple has officially removed Sierra from the Mac App Store. This means you can't just "re-download" it from your account's "Purchased" tab, as is still possible for many other versions. However, that does not mean all hope is lost. This guide will walk you through every legitimate method for finding, downloading, and creating a bootable installer for macOS Sierra.
What you’ll need
Turn on the Mac and immediately press and hold down the key on your keyboard.
Before you invest any time, it's crucial to ensure your Mac is actually compatible with macOS Sierra. It's also worth noting that macOS Sierra was the last version to support the HFS+ file system before Apple transitioned to APFS with High Sierra.
: Ensure your Mac is compatible with Sierra before starting. If your Mac is too new, the installer may not run. Microsoft Community Hub 2. Extract the Installer App The downloaded file is a containing a download macos sierra 1012 dmg file install
Installing directly from the DMG can work, but a USB installer is cleaner.
This generates Sierra.dmg for distribution or backup.
After the installation is complete, you'll be prompted to set up your Mac. Follow the on-screen instructions to: sudo /Applications/Install\ macOS\ Sierra
Copy and paste the following exact command into the Terminal window:
If your Mac is already running a compatible OS, you can try the macOS Sierra App Store link . 2. Prepare the Installer Once the InstallOS.dmg file has finished downloading: Mount the DMG: Double-click the .dmg file to open it.
Press , enter your administrator password, and wait for the process to finish. Terminal will show "Copy Complete" as shown in this guide . 6. Installing macOS Sierra 10.12 This means you can't just "re-download" it from