I have a brand new (late 2016) 15" MacBook Pro running macOS Sierra 10.12.3. 2.9GHz i7. 16GB RAM. 2TB SSD storage. Radeon Pro 460 with 4GB RAM. I am trying to export 1070 images that are resized to go into a time lapse video. Lightroom crashes every time I attempt to export this batch of files (or other batches of files), usually around image number 20 or so. The app doesn't just crash...it causes the computer to actually reboot. I tried exporting the same files on a Mac Pro with no issues.
I have reset my preferences and also disabled GPU, neither solved the issue.
It appears that resetting the SMC and PRAM solves this problem.