Yosemite os x

D

DelJo63

OS X 10.10: Yosemite-2014 -- that's quite OLD now. see
Here's the last 10 MacOS names:
  • 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.
If you're running any release from macOS 10.13 to 10.9, you can upgrade to macOS Big Sur from the App Store.

Support:
  • Sierra macOS 10.12.x.
  • High Sierra macOS 10.13.x.
  • Mojave macOS 10.14.x.
  • Catalina macOS 10.15.x.