MacBook Air, MacBook Pro, Mac mini, or Mac Pro (2010 or newer)
If you have a Mac that is currently running a newer OS and you want to downgrade, the official route is surprisingly difficult. Apple does not openly host Sierra on the App Store for new downloads anymore.
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SierraInstaller (You can use any name, but this guide uses this exact string). Format: Mac OS Extended (Journaled) Scheme: GUID Partition Map Click Erase and wait for the process to finish. Step 2: Run the Terminal Command Open Terminal (Finder > Applications > Utilities). Download Mac Os Sierra 10.12 Dmg
Select your USB drive from the left sidebar and click .
Before downloading macOS Sierra, ensure your hardware supports this specific operating system. macOS Sierra dropped support for several older Mac models that ran OS X El Capitan. Supported Mac Hardware Late 2009 or newer MacBook Air: Late 2010 or newer MacBook Pro: Mid 2010 or newer Mac mini: Mini Late 2010 or newer iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer Minimum System Requirements Memory: 2 GB of RAM (4 GB recommended) Storage: 8.8 GB of available storage space
Open the Applications folder and double-click to start the upgrade process. Method B: Creating a Bootable USB Installer (Clean Install) For a clean install, a bootable USB drive is recommended. MacBook Air, MacBook Pro, Mac mini, or Mac
Select "Install macOS" and follow the on-screen instructions. Troubleshooting Common Issues
Open your web browser and navigate to the official website's legacy download page. Locate the link for macOS Sierra 10.12 .
Mac OS Sierra 10.12 is the 13th major release of macOS, Apple's operating system for Mac computers. It was announced in June 2016 and released to the public in September 2016. Mac OS Sierra 10.12 brought several new features, including: This link or copies made by others cannot be deleted
: Supports MacBook and iMac (Late 2009 or later), and MacBook Air, MacBook Pro, Mac mini, and Mac Pro (2010 or later). Current OS
To run Mac OS Sierra 10.12 smoothly, your Mac must meet the following system requirements:
Before downloading, ensure your Mac supports this operating system. Generally, if your Mac is from 2009 or later, it is compatible. MacBook (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) Other Requirements: Memory: At least 2GB of RAM (4GB+ recommended) Storage: 8.8GB of free disk space to install 3. How to Create a Bootable USB Installer (DMG to USB)
Terminal will now copy the installer files to your USB drive. Once completed, the terminal will display "Done." How to Install macOS Sierra from the USB Drive
Go to your Applications folder and double-click Install macOS Sierra to begin the actual upgrade process. Creating a Bootable USB (Optional)