Yes I had this problem. The reason being is dani isn't an identified developer, so apple blocks him. You need to go into terminal to solve this. Here's what I used to open it:
success! thank you
do the servers work for you? i can get the launchers to work, but no servers show up.
edit: forgot to delete, solved the problem already
is anyone else having graphics issues with redlight greenlight?
Did you have Steam running in the background?
