[firedrake] Installation on macOS Sierra

Dear Firedrakers, I am installing firedrake on my macbook Pro with macOS Sierra 10.12.6. With the usual installation procedure (python3 firedrake-install), the installation looks successful (firedrake-install.log attached). However I have got over 200 fails and thousands of warnings in the tests. I have attached some of the error messages (see alltest.log). Do you have any idea how to fix this? All the best, Hiroe