I don’t know about this project, but I am using Qt in a C++ application, and this certainly works with macOS sandboxing. Qt will just open a native macOS dialo

I don’t know about this project, but I am using Qt in a C++ application, and this certainly works with macOS sandboxing. Qt will just open a native macOS dialog that will link files into the sandbox. From there you can pass the path returned by the dialog to sandboxing-oblivious C++ code. As a side note: Flatpaks in Linux use a similar mechanism for sandboxed applications (in Flatpak these are called ‘portals’).