Cannot open fortnite on mac

I use a Mac, OS 10.13.4. I have Epic Games Launcher loaded. I press launch; it switches to busy, the Fortnite logo appears in the Dock but it instantly shuts down. I used to play all the time until this glitch started happening a couple of weeks ago. does anyone know what i should do?

Hi there,

This website is intended for UE4 developers to get technical assistance with game development, please direct all Fortnite issues/questions to one of the following.

If you are experiencing issues with Fortnite such as crashes or account issues please visit Fortnite Help. There you will find various troubleshooting articles that will help you fix your issue. If you are still unable to resolve your issue please use the Contact Us form to get in touch with the Epic support staff who can assist you further. Be sure to include as much information as you can regarding your issue so support staff can get you back up and running as quickly as possible.

For any general questions, help with Fortnite gameplay, or discussions related to the game, please visit the Fortnite Forums.

Thank you