I'm on a Macbook Pro, same issues with the texture dump and then crashing. Seems to be worse lately.
I believe this actually fried my motherboard. It overheated and I had to replace it. I tried the LL viewer the other day and it worked great. I far prefer Firestorm, but I guess I'll have to switch until someone figures this out. It's not worth another motherboard and I don't have the tech knowledge to figure it out.