Don't use the Retraced 3D renderer, it's terrible, use the Cinema 4D 3D renderer instead. Go to your Composition settings, you can select it in there :-)
Hope this helps
PS you should also update your CUDA driver if it needs it ;-)
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Your new Mac does not have an NViDIA card so you cannot install the CUDA driver and must remove all instances of it.
You could have jacked up the Ray-traced render settings to the point that your system can't handle it, but as Angie said, CUDA and Ray-traced rendering is dead in AE. They are no longer working on it and the C4D 3D engine will do almost exactly the sam things better and with greater speed. Picking Ray-traced rendering when you do not have a compatible NVIDIA GPU is productivity suicide. Even if you get things working it's gong to be so slow that you are going to go crazy.