So, I have a mid-2012 MacBook Pro a1278, and I swapped out one of the RAM sticks for an 8gb crucial RAM stick, and although I know that supposedly it’s optimal to run your laptop with two identical sized RAM sticks, I’m here to tell you it works famously! Now, I’ve been running macOS Sierra, cuz I was on Catalina when I had only 4GB of RAM and it was next to IMPOSSIBLE. So my question is, is it worth upgrading to macOS Mojave now that I have 10gbs? It’s the last macOS to only require 2gbs minimum (Catalina needing 4).