I want to switch from my outdated and arthritic windows machine to a MacBook Pro. My question is, which Mac model should I buy? I noticed that several people here have Mac 2013, which I know can be gotten rather cheaply from Amazon. Would it be worthwhile to invest in a Mac 2013 or should I try for a more up to date model? I'm interested in using Mojave and my computer update cycle is generally a computer every five years or so. So I want a system that will get MacOS updates at least for the next five years.