Spyder startup trouble

Question

I have troubles to start Spyder. This is the error message:

Traceback (most recent call last):
File "/Applications/anaconda3/bin/spyder", line 7, in 
from spyder.app.start import main
File "/Applications/anaconda3/lib/python3.6/site-packages/spyder/app/start.py", line 27, in 
from spyder.config.main import CONF
File "/Applications/anaconda3/lib/python3.6/site-packages/spyder/config/main.py", line 22, in 
from spyder.config.user import UserConfig
File "/Applications/anaconda3/lib/python3.6/site-packages/spyder/config/user.py", line 26, in 
from spyder.utils.programs import check_version
File "/Applications/anaconda3/lib/python3.6/site-packages/spyder/utils/programs.py", line 18, in 
import subprocess
File "/Applications/anaconda3/lib/python3.6/subprocess.py", line 136, in 
import _posixsubprocess
ImportError: dlopen(/Applications/anaconda3/lib/python3.6/lib-dynload/_posixsubprocess.cpython-36m-darwin.so, 2): Symbol not found: __Py_set_inheritable_async_safe
Referenced from: /Applications/anaconda3/lib/python3.6/lib-dynload/_posixsubprocess.cpython-36m-darwin.so
Expected in: flat namespace
in /Applications/anaconda3/lib/python3.6/lib-dynload/_posixsubprocess.cpython-36m-darwin.so

Somebody have an idea of what's going on?

Answer 1

run conda update --all

can solve this problem！

Answer 2

(Spyder maintainer here) To fix this you need to open Terminal.app and run there

conda update python python.app spyder