GPU Rendering in Cycles crashing blender (Mac) I've been experiencing loads of crashing while rendering lately, and after doing some testing I've finally isolated it to the GPU rendering. As soon as I change to that from CPU, blender goes down. This is odd, because I did a whole project (cgmastersnet Corvette course) with it on and had zero crashes. I have not updated Blender since then. 

I found a thread about this on blender.org -> 
https://developer.blender.org/T53945

They seem to be saying it could be an issue with MacOS High Sierra  (I am not running High Sierra, I am running Mojave 10.14.) This is my system:

Model Name: iMac
Model Identifier:   iMac14,2
Processor Name: Intel Core i5
Processor Speed:    3.2 GHz
Number of Processors:   1
Total Number of Cores:  4
L2 Cache (per Core):    256 KB
L3 Cache:   6 MB
Memory: 32 GB
Boot ROM Version:   IM142.0130.B00
SMC Version (system):   2.15f7
Graphics card: GeForce GT 755M


And this is my Blender

2.79 - 2017-9-11


I'm wondering if others have solved this issue. I'm confused on what might have changed (other than the project - which is far simpler than a corvette). 

I tried removing any recent add-ons I have used in the past few weeks, saved prefs and restarted, but the crash still happens. 

Not sure what other info I can provide, please let me know. For now seems I am stuck with CPU rendering, which is a bummer.
Starting with MacOS 10.14 Mojave, Apple is discontinuing support for OpenCL and OpenGL, in favor of their Metal 2 technology. Maybe this has something to do with your problems.