MacOS Sierra

macOS Sierra (10.12) is a version of macOS that was released on 2016-09-20. It is the first version of Mac OS X to use the "macOS" branding for marketing materials, matching the rest of Apple's OS names (iOS, watchOS, tvOS, etc).It is the first version of Mac OS X to drop the non-SSE4 Intel CPUs.(65nm Core 2 Duo(Merom)、65nm Xeon(Clovertown)).