MacOS Sierra is the twelfth version of Mac OS X/OS X, so it is reasonable to refer to it as Mac OS X 10.12 or OS X 12, as well. MacOS Sierra (10.12) -- based on the desktop photo -- presumably is named after the Sierra Nevada mountain range in keeping with Apple's recent theme of naming its Mac operating systems after attractive locations in California -- Mavericks (10.9), Yosemite (10.10), and El Capitan (10.11).
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Vectorworks 2019 System Requirements The following are real-world system requirements for running Vectorworks 2019. In some demanding cases, we would suggest a more capable machine than is described in these hardware profiles. Likewise, there are some less demanding situations where Vectorworks will perform well on older hardware.