We also had lots of issues with development on Mac (my FE colleague insists on using a Mac, even though GNU/Linux is a more productive environment for development :-)).
What we settled on was a docker container with Ubuntu installed in it and running all the python / google app engine code inside of it instead of trying to get the Mac into a usable state. Attila -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/8af30536-ca52-470f-be03-3b4f7da37a5b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.