Before downloading, ensure your Mac supports Sierra 10.12. Generally, the following models are compatible: : Late 2009 or newer. MacBook Air / Pro / mini / Mac Pro : 2010 or newer. Important Technical Notes
Before installing macOS Sierra 10.12, ensure your Mac meets the system requirements:
Use Disk Utility to erase your USB as "Mac OS Extended (Journaled)" with a "GUID Partition Map".
Before downloading, ensure your Mac supports Sierra 10.12. Generally, the following models are compatible: : Late 2009 or newer. MacBook Air / Pro / mini / Mac Pro : 2010 or newer. Important Technical Notes
Before installing macOS Sierra 10.12, ensure your Mac meets the system requirements: mac os sierra 1012dmg download free
Use Disk Utility to erase your USB as "Mac OS Extended (Journaled)" with a "GUID Partition Map". Before downloading, ensure your Mac supports Sierra 10
