I am currently exploring AMD ProRender as an alternative to the NVIDA CUDA accelerated Cycles render engine.
With GPU only the
gpu only the?........message terminated
I just read that mid last year some macOS users also have the issue
macOS - Blender crash on with GPU and CPU checked
trace dump files.zip - Google Drive
I think on some of the older macPro there is an issue with SSE CPU instructions not enabled. But GPU rendering works?
Truth is also that the modern GPUs just run circles around the CPU rendering to openCL including older Xeon CPUs even when being a dual six core cpu.