Life In 19x19

I keep reading where GoReviewPartner runs on the Mac, but all I see is "For Linux/Mac, it is best to get the source code from Github." What do I do once I download the source code? Could someone give me step-by-step instructions once that's done?

(I already have the Leela GTP engine running under ...

I have a small project idea for any go programmers out there who want to tackle it. I've always wondered whether there is an optimal number of groups to aim for in a game. Or rather, whether there are optimal ratios of groups that might have a higher winning percentage, e.g. four groups to three ...