Hi BR Vetle,
Do you get a crash log?
Are you submitting the crash reports to us with your email address? If you are including your email address in the crash reports we can look them up here.
What does the crash log say? Can you post the crash details here in the forums?
tried to post a full error report but got an error when trying. I will try again later.
I was chat with Adobe tech support for 1 hour 36 minutes complaining of the same issue, slide show crashes Lightroom. I too am running on a new IMac Retna. This sounded like the first time the tech rep heard of the problem. He was going to talk to his supervisor and get back with me. He saw the crash log and also saw the slide show crash LR. He took control of my computer and ran the program. So they hopefully are working on the issue. I also have a Macbook pro and the same photos will run fine on it. It is running LR version 5.2 camera raw 8.2. The error report is many pages long.