We are trying to support building back to Qt 5.10 and back to MacOS 10.13 but various combinations had issues with crashing or missing native file dialogs over the years. Moving to Qt non-native file dialogs prevented those issues. Once we move to Qt6 and have to drop support for macOS versions less than 11.0 (or 10.14) I will try using native file dialogs again to see if they have fixed the issues.
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