I asked them before to compile the keychain for python3 but they said since it is not the standard distribution they won’t do it.
You can compile the tool chain yourself but it puts massive load on your mac and it takes about 5-6 hours.
FWIW, we’ve actually been working on a massive Python3 migration for Swift. We’re still a little ways away, but getting much closer. 
@saeta - I am ready to be a beta tester! Since you’re on S4TF team, can you please answer the following question? When in the future I am able to use Swift for Tensorflow on MacOS (via jupyter-swift), will I be able to use other system frameworks that come with MacOS? I am particularly interested in Accelerate, Metal, and MetalPerformanceShaders.