Question: what is os x version 10.12?
Answer: macOS Sierra (version 10.12) is the thirteenth major release of macOS (previously Mac OS X from 2001 to 2012 and OS X from 2012 to 2016), Apple Inc.'s desktop and server operating system for Macintosh. It was the first version of the operating system issued under the June 2016 rebranding as macOS.