What osx to put on an old mac?

Question

macOS

What axis to put on macbook pro 2011 late? On mavericks, el captain and sierra are very stupid ...
I think something between a lion .. What is your opinion?

Answer 1

Maybe think of an upgrade? SSD? (I don’t know how the issue with the expansion of the RAM is, but if it’s possible, then it’s necessary)
And yes, “mac can’t slow down .. how so” (c) :))

Answer 2

MBP Early 2011, 16 Gb RAM , El Capitan 10.11.6, no slowdowns.