Question: what are mac os versions?
Answer: MacOS 10.14: Mojave- 2018. MacOS 10.13: High Sierra- 2017. MacOS 10.12: Sierra- 2016. OS X 10.11: El Capitan- 2015. OS X 10.10: Yosemite-2014. OS X 10.9 Mavericks-2013. OS X 10.8 Mountain Lion- 2012. OS X 10.7 Lion- 2011.