Before downloading and installing Mac OS Sierra 10.12, ensure that your Mac computer meets the system requirements:
Ensure your Mac meets these minimum requirements before attempting the installation: : At least 2GB of RAM. : At least 8.8GB of available disk space. Supported Models : Late 2009 or newer. MacBook Pro : Mid 2010 or newer. MacBook Air : Late 2010 or newer. : Mid 2010 or newer. : Late 2009 or newer. : Mid 2010 or newer. Creating a Bootable USB Download Mac Os Sierra 10.12 Dmg
Synced the Desktop and Documents folders across multiple devices. Technical Requirements and Installation To run macOS Sierra, systems required at least 2GB of RAM (though 4GB was recommended) and 8.8GB of available storage . It supported most Mac models from late 2009 and later. Before downloading and installing Mac OS Sierra 10