Before downloading, ensure your hardware meets the minimum 2GB of RAM and 8.8GB of available storage. macOS Sierra - Technical Specifications - Apple Support
Several features characterized macOS Sierra 10.12, making it a notable upgrade from its predecessors: mac os x sierra 10.12 download
If you're unable to download Mac OS X Sierra 10.12 from the Mac App Store, you can try downloading it from Apple's support website: Before downloading, ensure your hardware meets the minimum
: If your Mac is compatible and running an older version like El Capitan or Yosemite, you can often find Sierra via the App Store link . Note that the "Get" button may be dimmed if your current hardware is considered too new or incompatible. mac os x sierra 10.12 download