In the newest version of LR CC, when trying to export 2 or more files from a RAW file to PSD file, LR crashes. It can handle up to two files but no more than that. Before this last upgrade I was able to export as many files I wanted from RAW to PSD without a problem. Any suggestions... also LR is running quite slower now as well. I am running on a 2013 Mac Pro Quad Core with 32GB memory.
Please try and turn off the Graphics Processor.
Go to Lightroom Preferences.
Click on the Performance tab
Uncheck the Graphics Processor
Let us know if that helps.
In addition to Mohit's suggestion, you may also want to try to deactivate the new import screen: