macOS Sonoma (14.0) - matplotlib - "Secure coding is not enabled" warning

Community
1

With the release of macOS Sonoma (14.0), any use of matplotlib in Python code creates a warning similar to the following:

2023-11-07 07:01:09.093 Python[85638:66129140] WARNING: Secure coding is not enabled for restorable state! Enable secure coding by implementing NSApplicationDelegate.applicationSupportsSecureRestorableState: and returning YES.

I was not able to find an existing matplotlib issue related to this warning, but it relates to a known serious potential vulnerability; apparently Apple made this a warning and not an error to avoid breaking existing apps until they could be individually fixed:

Could this be fixed as part of the upcoming matplotlib release?

2

This is probably doable, but it would be best if you open an issue so that developers with macOS expertise could look at it.

3

@setaylorcityu I filed an issue at Matplotlib Github to track this since I also experienced it. It was repeatable for me until I closed and restarted my venv. Do you still get the warning? Is there anything you can contribute to the discussion to help the devs reproduce the warning?