MacOS Spectator Plugin

This app allows you to spectate games simply by clicking a button in your browser, no terminal required

Download

Once you have downloaded the app, right click it and select "Open" (you only have to do this once). Don't worry if nothing happens, that's normal

Then just make sure to click "Open Spectator App" whenever want to spectate a game

Note: In order for this to work you must have your League of Legends app in the Applications folder