10/18 Update:
Developers using Macs with NVIDIA graphics cards are reporting that after upgrading from 10.13 to 10.14 (Mojave) they are experiencing rendering regressions and slow performance.
Apple fully control drivers for Mac OS. But if Apple allows, our engineers are ready and eager to help Apple deliver great drivers for Mac OS 10.14 (Mojave).
Apple’s recently released macOS 10.14 (Mojave) does not support CUDA. For CUDA developers who are on macOS 10.13, it is recommended to not upgrade to Mojave. Developers may not be able to use Xcode 10 to build GPU applications or run CUDA applications. Both macOS 10.13.6 and Xcode 9.4 support CUDA and work great with CUDA 10. NVIDIA is working with Apple to get Mojave to support CUDA.