Lightroom 6.1.1 still crashes in the Slideshow Module. I'm using OS-X 10.10.5 on a MacBook Pro. I am not using GPU. The software is simply unstable in Slideshow. This is clearly a bug - but I cannot find any way to contact Adobe about it. I'm really frustrated. The company has sold me a product that isn't fit for purpose, and there seems to be absolutely no way to contact them about it. I find this to be a completely unacceptable situation.
I am having the exact same problem! I have sent reports to Adobe but no response! I have sent the reports to Adobe but nothing as yet.