Your Mac must meet these minimum requirements to run Sierra: : Late 2009 or newer MacBook : Late 2009 or newer MacBook Pro : Mid 2010 or newer MacBook Air : Late 2010 or newer Mac mini : Mid 2010 or newer Mac Pro : Mid 2010 or newer
https://apps.apple.com/us/app/macos-sierra/id1127487414?mt=12 10.12 sierra download
: For users already on 10.12 who need the final stable version, the macOS Sierra 10.12.6 Combo Update is recommended for better stability and security. System Requirements & Compatibility Your Mac must meet these minimum requirements to
This is usually a server timeout. Pause and resume the download in the "Purchases" tab of the App Store (if visible), or simply re-click the link from the Apple Support page. Before downloading, ensure your hardware is compatible
Before downloading, ensure your hardware is compatible. macOS Sierra requires at least and 8.8GB of available storage . Compatible Versions MacBook Late 2009 or newer MacBook Air Late 2010 or newer MacBook Pro Mid 2010 or newer iMac Late 2009 or newer Mac mini Mid 2010 or newer Mac Pro Mid 2010 or newer Key Features of macOS Sierra