Solved: As a mac user you should not pack the directory where your project is in but all the files inside. So that the main.lua file is in the root of the zip-file. And then rename it to .love.

Thanks anjo!

Hi guys, first of all great library / framework you have here. I got excited by the screenshots and started to try some developing. The last 3 days I learned a lot about lua and created a game. It's nice to see an engine that actually helps you get what you want and not makes you do thinks you don't...