Discovered this really cool mac utility right now Karabiner Elements Lets you customize keys on your keyboard to do various things. So if you are using an external keyboard on your mac, the function keys are mostly useless (F1-F12) — which you can now use as Media keys and other customizable shortcuts.

Karabiner actually lets you do a whole lot more than just remapping. Checkout my config file, I've commented the file with explanations. https://github.com/sidharthv96/dotfiles/blob/master/.config/karabiner.edn