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Before downloading the installer, ensure your Mac supports macOS Sierra 10.12.6. Running this operating system on unsupported hardware can cause system instability. Supported Mac Models 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 Hardware Requirements Memory: Minimum 2 GB of RAM (4 GB recommended) Storage: At least 8.8 GB of available storage space work download macos sierra 1012 6
: Double-click the downloaded .dmg or .pkg file and follow the on-screen instructions user wants a long article about the keyword