UE4 crashes on startup (OSX - fresh install)

Hey,
So I’ve been using UE4 on my MacBook Air last year and everything was fine. I wanted to restart using it for game dev so I decided to reinstall UE4. I tried to download the 4.17 (preview) but it sadly doesn’t change the problem. I also tried verifying the install and it found nothing.

I have install ed UE4 of an external HDD following the steps given on the wiki and I have posted with this post the crash logs as well as my hardware information. Thank you for any help that you can give me.