I have been using Processing 3.3 with Processing.py in my classroom for quite a while with no problems. A student just brought in her MacBook Air, onto which she loaded Processing 3.4. We’re seeing the same Python mode behavior as mentioned above - when the program runs there’s no error message, no window display, nothing. The console area scrolls a little but nothing is displayed in it. Java mode seems to work. I see that the title of this message is marked SOLVED but I don’t see any solution posted.
Thanks,
Andy