Mac OSX UE4 Rendering Issues

I literally have no idea what is going on, but for some reason UE4.10 does this every single time i am using the editor
:frowning:
I need help, it is really hard to do anything when it keeps doing this:

Glitch

my graphics literally keep doing this for no known reason, no errors.

I really need help with this!
I literally imported a new FBX car that I have and it eventually CRASHED my mac, it literally restarted just now because of unreal engine :frowning: