As soon as I activate the 'Use CPU' checkbox in the Render settings of Blender, I get an error message, stating:
"RPR: rendering PRODUCTION
ERROR: Check log for details"
I don't know where to find the log, but as soon as I uncheck the 'Use CPU' checkbox, the rendering succeeds.
• Apple iMac Pro: 3.2 GHz Intel Xeon W 8-core CPU (16 threads)
• 32 GB 2666 MHz DDR4 RAM
• AMD Radeon Pro Vega 64 16 GB
• Wacom Intuos Pro Medium
• MacOS High Sierra 10.13.5
• Blender V 2.79b
• RPR version 1.6.159
• 'Use CPU' checkbox activated
The rprblender.log file might help us here. Can you see if you can find it in:
Open a Terminal and search in this directory or below.
No problem, I've checked the log file. These are the two error lines in there:
rpr.default : ERROR Can't download json file.
rpr.default : ERROR Hemi lamp is not supported. Empty light will be used.