Unable to Complete Renders

I'm having problems getting my renders to complete. I keep getting the error message "A problem caused the application to stop working correctly."

I need my final output to be in high resolution, however the small details like lighting acuracy aren't quite as important. I'm using the snapshot function to get files that will work for now. Any tips or settings that may help get a final render?

iMac Pro (2017)

Processor: 3 GHz 10-Core Intel Xeon W

Memory: 32 GB 2666 MHz DDR4

Graphics: Radeon Pro Vega 56 8 GB