Mac Render Error

When I create a new blank project on my iMac and my , I see this happening. I also brought in my own simple FBX and the same thing is happening on that. This also appears when I am not running the game.

Anyone know what this is / how to fix it?

UE4 4.9 exposed a bug on some Mac GPU/drivers that causes this and it has been fixed for 4.10.