This is a bug on Anki 2.1.52 qt6. I’m using macos 12.3.1.
Steps to reproduce:
Open Anki
Go to menu bar and click About Anki
Click the Ok button in the bottom right corner of the About Anki window
Expected behavior:
The About Anki window closes but the main Anki window remains.
Observed behavior:
All Anki window closes and macos notifies the user that Anki has closed unexpectedly. Anki’s app signature also breaks (checked using Whatsyoursign).