Why wont my UE4Editor run?

macbook pro, 2.5GHz intel core i5, 4 GB MHz DDR3, intel HD Graphics 4000 1536.
Is there a reason why my computer will not run this? It worked the first time when i installed it but will not start up now.

Hi Bryce Odell,

We noticed that this is a duplicate post of this question: UE4 editor will not launch - Platform & Builds - Epic Developer Community Forums

We will be closing this post in order to focus the discussion in one place.