Thanks! I finally came across the thread that I needed. I downloaded el capitan so that I could download High Sierra, which is what I have now. It's actually an early 2011 macbook pro. I'm still playing around with it and finding essential apps to download. I've noticed you can't always find what you need in the app store. It was great that the thread I found had the links for el capitan and high sierra. I'm wondering what apps are out there that I might want that aren't in the app store.