I asked this question https://stackoverflow.com/questions/49955313/toplevel-does-not-create-new-independent-windows-on-macos on Stack Overflow, thinking it was a Python programming problem.
Since then, a number of users have reported no issue, and I installed Python 3.6.5 on an old MacBook, running 10.12.6 and the code runs as expected.
Can anyone suggest why it does not work on my new iMac (Retina 4K, 21.5-inch, 2017) running 10.13.4 and more importantly what I can do to change this.
The program also fails to run correctly on a 2011 MacBook Pro running 10.13.3 under Python 3.6.4
The following show the display, and after resizing.
I can drag the 3
Toplevel() windows on screen, and they then display normally.
Running the program on
Linux Python 3.5.3 shows:-
I upgraded to https://www.python.org/ftp/python/3.6.5/python-3.6.5-macosx10.9.pkg (which has an included version of Tcl/Tk 8.6) on both the 2011 MacBook Pro and iMac (Retina 4K, 21.5-inch, 2017) which both exhibited the same problem, so it would seem to be a problem with the Python interface to macOS 10.13