Hi @ImHS . Not having a working Cython isn’t a big problem, it will only make your simulations a bit slower. As the log message says, you can disable it manually to avoid the error:
prefs.codegen.target = “numpy”
While this will lead to slightly slower simulations, it has the advantage that it does not need to compile code first, i.e. the time until the actual simulation starts is shorter. Especially for simpler simulations, or during development where you change/re-run simulations very often, this can actually be faster in total.
For fixing the issue with Cython, did you try what the info message suggested? You seem to be in the exact situation it mentions (conda on OS X):
Also see this discussion thread: Problem with Cython - #21 by Tioz90