Excellent, then! OpenCL it is. Thank you for your help, Zom-B :) At least on the PC you need to install the NVIDIA GPU drivers to get CUDA not the Toolkit, maybe here is the misunderstanding. For Indigo OpenCL is afaik better maintained, and the CUDA render path rather a relict from old days, so if ...

No luck, I'm afraid. I uninstalled Indigo and installed the CUDA toolkit (there's an OSX 10.9-specific version, though no version number difference) before installing 3.6.23. On the positive side, OpenCL rendering now works. But still no CUDA support is apparent. Is there a log generated by the beta...

I accidentally installed Indigo before CUDA and now can't get Indigo to recognize CUDA (OpenCL shows), even after uninstalling Indigo, reinstalling the CUDA drivers, rebooting (that was magical thinking, there) and reinstalling Indigo. And various permutations. The software is Indigo 3.4.18, CUDA dr...