I'm thinking of reverting to Mavericks (OSX 10.9) (pic related) because it's the last before flatshit design took over.
But what is the last version of OSX that will install all modern software? What is the last version of OSX that will install all modern games from the Apple Store? What is the last version of OSX that will run recent builds of emulators? What is the last version of OSX before they dumbed everything down to make normies comfortable? What is the last version of OSX before it got pozzed by SJW and other deviants?