Well, after 5 years with the Maverick, and my Gmail saying "browser out of date, I finally upgraded to High Sierra, got rid of the browser alarm, and our upcoming alpha/Beta test is running fine.
Sure, this "old dog" has to learn new navigations for Safari, and I couldn't find the correct answer from Apple, so I journeyed to WikiP for the "O.S. History"https://en.wikipedia.org/wiki/MacOS_version_history
yep- I did forget the keyword-Version! doggone, I surely miss the days of hand crank windows, radiator fans driven by belts, and I still won't buy one of those "smart" phones!