I purchased a used Mac Mini that came with OS X Yosemite. Since then I upgraded to OS X El Capitan and MacOS Sierra. It is a 2014 edition, 1.4 GHz Core i5 with 4 GB of RAM. I am primarily an iOS user, so I don’t know as much about the Mac. My iPhone 7 Plus and 12.9 iPad Pro are way faster than my Mac, so I tend to use my Mac less because of that. Since MacOS High Sierra is mostly cleanup and not as much new features, will this in theory speed up my Mac?