[issue35485] Mac: tkinter windows turn black while resized

[Ned Deily]

Ned Deily <nad at python.org> added the comment:

Update: After producing release installers for 3.7.2 and 3.6.8 using Tk 8.6.9.1 (option 2 above), I ran into a new and much more severe regression.  For macOS 10.14 (Mojave), the only regression I know of remains the "window turning black while resizing" issue.  However, when I did a quick test with macOS 10.13 and a few older systems, I found that, while they didn't exhibit the resizing issue, attempts to open IDLE's Settings (Preferences) window or the "About IDLE" window caused IDLE to become inoperative, requiring a Force Quit to exit.  10.14 does not seem to exhibit this behavior.  Given that, I felt we had no choice but to fall back to Tcl/Tk 8.6.8 (option 1).  When linked with 8.6.8, IDLE exhibited neither the screen size issue nor the inoperative issue on the systems I quick tested (10.8, 10.13, and 10.14).

Needless to say, this has not been very encouraging. I think someone (not me) needs to follow up on these issues with the Tk folks, perhaps open issues on the Tk tracker especially if they can be duplicated without Python. We also can't rule out the need for IDLE or tkinter changes to accommodate Tk fixes for long standing problems.

I will leave available the test installers I produced last week with the top of trunk 8.6.x to make it easier to experiment with.

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priority: release blocker -> deferred blocker

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<https://bugs.python.org/issue35485>
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