latest OS software update for a MacBook Pro (13-inch, Late 2011)

What is the latest OS software update for a MacBook Pro (13-inch, Late 2011)? The issue i am running into is that I use a program that requires MAC OS 10.14 to run, and I don't know if my current mac is able to install such update. Currently I have a MacOS High Sierra Version 10.13.6. and under software updates there is no update available for me.