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I am using the python 3.5.2 distribution from brew install python3 and when I start IDLE I receive the following error message: 

WARNING: The version of Tcl/Tk (8.5.9) in use may be unstable.
Visit http://www.python.org/download/mac/tcltk/ for current information.

After following python.org's recommendation for which version of ActiveTcl, I then installed 8.5.18.

Next, following the information in this thread, I uninstalled python3 using brew uninstall python3 and re-installed using brew install python3. Finally, I restarted my mac (macOS 10.12)

However, I am still seeing the same error when I open IDLE. Any suggestions as to how I can fix this?

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nukenine
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  • I wonder if using `brew` also deals with the tcl part itself so it doesn't use the newer version, hard to rule that aspect out. I do know that the [function that makes that error message](https://github.com/tadhgmister/cpython/blob/master/Lib/idlelib/macosx.py#L70) does say that `8.5.9` can crash unexpectedly but isn't as bad as `8.5.7` I also know that I never figured this out for myself. :/ – Tadhg McDonald-Jensen Dec 18 '16 at 23:42

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I tried uninstalling/installing from python.org and homebrew many times and eventually this method worked for me:

brew remove python3
brew install homebrew/dupes/tcl-tk
brew install python3 --with-tcl-tk
brew linkapps python3
nukenine
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