Run the following command (ensure your USB is named "Sierra"): sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Sierra --applicationpath /Applications/Install\ macOS\ Sierra.app Enter your administrator password. Wait for the process to finish ("Done"). Part 4: How to Install macOS Sierra 10.12
You can download the official macOS Sierra disk image (.dmg) file directly from Apple's servers using a web browser (ideally Safari): Apple Support Official Link Download macOS Sierra 10.12 Apple Support Compatibility Check
Once you have the .dmg file (typically named InstallMacOSX.dmg or similar):
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macOS Sierra 10.12 is the 13th major release of macOS, Apple's operating system for Mac computers. It was announced on June 13, 2016, at the WWDC conference and was released to the public on September 20, 2016. macOS Sierra 10.12 introduced several new features, including Siri integration, a revamped Messages app, and improved security features.
If you are encountering a specific error message, please share it. I can also help you: if you're using Windows to make it. Troubleshoot "installer is damaged" errors. Recommend the best macOS for your specific Mac model.
Use the createinstallmedia command, replacing MyVolume with your USB drive's name: sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app Enter your password and wait for the process to complete. Step 3: Run the Installer Run the following command (ensure your USB is
Before downloading the installation files, ensure your target Mac hardware is fully compatible. macOS Sierra dropped support for several older hardware architectures 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: Late 2010 or newer iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer Minimum Specifications Memory: 2 GB of RAM (4 GB recommended) Storage: 8.8 GB of available storage space OS Baseline: OS X Lion 10.7.5 or later to upgrade directly How to Download macOS Sierra 10.12 DMG
Open the mounted volume and double-click the package file.
Open your web browser and navigate to the official Apple Support page for downloading older macOS versions. Locate the link for . Download the file packaged as InstallMacOSX.dmg . It was announced on June 13, 2016, at
Choose your primary hard drive as the destination destination.
Avoid third-party websites offering .dmg files. They may contain malware. Only use direct links from Apple. Part 1: Download macOS Sierra 10.12 DMG / Installer